diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74e5154..e232c43 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Added
+- content: `scripts/seed_content.py` — seeds two article templates (EN + DE) and 18 cities × 2 language rows into the database; run with `uv run python -m padelnomics.scripts.seed_content --generate` to produce 36 pre-built SEO articles covering Germany (8 cities), USA (6 cities), and UK (4 cities); each city has realistic per-market overrides for rates, rent, utilities, permits, and court configuration so the financial model produces genuinely unique output per article
+- content: EN template (`city-padel-cost-en`) at `/padel-cost/{{ city_slug }}` and DE template (`city-padel-cost-de`) at `/padel-kosten/{{ city_slug }}` with Jinja2 Markdown bodies embedding `[scenario:slug:section]` cards for summary, CAPEX, operating, cashflow, and returns
+
+### Fixed
+- content: `bake_scenario_cards()` now accepts a `lang` parameter and passes it to scenario partial templates; previously `lang` was always `undefined`, causing all cards to render with English labels even for German articles
+- admin: `_generate_from_template()` extracts `language` from data row and passes it to `calc()` and `bake_scenario_cards()` so German scenario cards use translated CAPEX/OPEX item names
+- admin: `_generate_from_template()` now derives `article_slug` as `{template_slug}-{city_slug}` instead of bare `city_slug`; bare slugs caused UNIQUE constraint collisions when multiple templates generated articles for the same city
+- admin: `_rebuild_article()` passes `lang` from data row (or `"en"` for manual articles) to `bake_scenario_cards()` so rebuilt articles render correct language labels
+- content: removed unused `g` import from `content/routes.py`
+
 ### Changed
 - planner: full HTMX refactor — replaced 847-line SPA `planner.js` with server-rendered Jinja2 tab partials; planner now uses `hx-post /planner/calculate` + form state; all tab content (CAPEX, Operating, Cash Flow, Returns, Metrics) rendered server-side; Chart.js data embedded as `<script type="application/json">` tags, re-initialized on `htmx:afterSettle`; new `planner.js` is ~200 lines (chart init, slider sync, toggle management, wizard nav, scenario save/load)
 - planner/i18n: merged `_PLANNER_TRANSLATIONS` (~200 keys × 2 languages) into `_TRANSLATIONS`; deleted `get_planner_translations()` and `window.__PADELNOMICS_LOCALE__`; all planner strings now via standard `{{ t.key }}` Jinja2 template variables; adding a new language = one section in `_TRANSLATIONS`
diff --git a/padelnomics/src/padelnomics/admin/routes.py b/padelnomics/src/padelnomics/admin/routes.py
index ef52cfc..5835db9 100644
--- a/padelnomics/src/padelnomics/admin/routes.py
+++ b/padelnomics/src/padelnomics/admin/routes.py
@@ -1136,9 +1136,10 @@ async def _generate_from_template(template: dict, start_date: date, articles_per
         data = json.loads(row["data_json"])
 
         # Separate calc fields from display fields
+        lang = data.get("language", "en")
         calc_overrides = {k: v for k, v in data.items() if k in DEFAULTS}
         state = validate_state(calc_overrides)
-        d = calc(state)
+        d = calc(state, lang=lang)
 
         # Build scenario slug
         city_slug = data.get("city_slug", str(row["id"]))
@@ -1183,7 +1184,7 @@ async def _generate_from_template(template: dict, start_date: date, articles_per
         data["scenario_slug"] = scenario_slug
         title = _render_jinja_string(template["title_pattern"], data)
         url_path = _render_jinja_string(template["url_pattern"], data)
-        article_slug = city_slug
+        article_slug = template["slug"] + "-" + city_slug
 
         meta_desc = ""
         if template["meta_description_pattern"]:
@@ -1196,7 +1197,7 @@ async def _generate_from_template(template: dict, start_date: date, articles_per
         # Render body
         body_md = _render_jinja_string(template["body_template"], data)
         body_html = mistune.html(body_md)
-        body_html = await bake_scenario_cards(body_html)
+        body_html = await bake_scenario_cards(body_html, lang=lang)
 
         # Write to disk
         BUILD_DIR.mkdir(parents=True, exist_ok=True)
@@ -1638,13 +1639,15 @@ async def _rebuild_article(article_id: int):
 
         body_md = _render_jinja_string(td["body_template"], data)
         body_html = mistune.html(body_md)
+        lang = data.get("language", "en")
     else:
         # Manual article: re-render from markdown file
         md_path = Path("data/content/articles") / f"{article['slug']}.md"
         if not md_path.exists():
             return
         body_html = mistune.html(md_path.read_text())
+        lang = "en"
 
-    body_html = await bake_scenario_cards(body_html)
+    body_html = await bake_scenario_cards(body_html, lang=lang)
     BUILD_DIR.mkdir(parents=True, exist_ok=True)
     (BUILD_DIR / f"{article['slug']}.html").write_text(body_html)
diff --git a/padelnomics/src/padelnomics/content/routes.py b/padelnomics/src/padelnomics/content/routes.py
index 1032153..fd8aa8e 100644
--- a/padelnomics/src/padelnomics/content/routes.py
+++ b/padelnomics/src/padelnomics/content/routes.py
@@ -7,7 +7,7 @@ from pathlib import Path
 
 from jinja2 import Environment, FileSystemLoader
 from markupsafe import Markup
-from quart import Blueprint, abort, g, render_template, request
+from quart import Blueprint, abort, render_template, request
 
 from ..core import capture_waitlist_email, config, csrf_protect, fetch_all, fetch_one, waitlist_gate
 
@@ -48,7 +48,7 @@ def is_reserved_path(url_path: str) -> bool:
     return any(clean.startswith(p) for p in RESERVED_PREFIXES)
 
 
-async def bake_scenario_cards(html: str) -> str:
+async def bake_scenario_cards(html: str, lang: str = "en") -> str:
     """Replace [scenario:slug] and [scenario:slug:section] markers with rendered HTML."""
     matches = list(SCENARIO_RE.finditer(html))
     if not matches:
@@ -79,7 +79,7 @@ async def bake_scenario_cards(html: str) -> str:
         state_data = json.loads(scenario["state_json"])
 
         tmpl = _bake_env.get_template(template_name)
-        card_html = tmpl.render(scenario=scenario, d=calc_data, s=state_data)
+        card_html = tmpl.render(scenario=scenario, d=calc_data, s=state_data, lang=lang)
         html = html[:match.start()] + card_html + html[match.end():]
 
     return html
diff --git a/padelnomics/src/padelnomics/scripts/seed_content.py b/padelnomics/src/padelnomics/scripts/seed_content.py
new file mode 100644
index 0000000..7a3fcdc
--- /dev/null
+++ b/padelnomics/src/padelnomics/scripts/seed_content.py
@@ -0,0 +1,887 @@
+"""
+Seed programmatic SEO content: article templates + city data rows.
+
+Inserts two article templates (EN + DE) and 18 cities × 2 language rows
+into the database. Optionally runs the full generation pipeline to produce
+pre-built HTML files and articles rows.
+
+Usage:
+    # Seed templates + data rows only (then trigger generation in admin):
+    uv run python -m padelnomics.scripts.seed_content
+
+    # Seed + generate articles immediately (all published, backdated 30 days):
+    uv run python -m padelnomics.scripts.seed_content --generate
+"""
+
+import asyncio
+import json
+import os
+import sqlite3
+import sys
+from datetime import date, timedelta
+from pathlib import Path
+
+from dotenv import load_dotenv
+
+load_dotenv()
+
+DATABASE_PATH = os.getenv("DATABASE_PATH", "data/app.db")
+
+# =============================================================================
+# Input schema — shared between EN and DE templates.
+# Fields whose "name" matches a calculator DEFAULTS key are auto-passed to
+# the financial model at generation time; all others are display-only.
+# =============================================================================
+
+INPUT_SCHEMA = [
+    {"name": "city", "label": "City Name", "field_type": "text", "required": True},
+    {"name": "city_slug", "label": "City Slug", "field_type": "text", "required": True},
+    {"name": "country", "label": "Country Code (DE/US/GB)", "field_type": "text", "required": True},
+    {"name": "country_name", "label": "Country Name", "field_type": "text", "required": True},
+    {"name": "region", "label": "Region (for hub grouping)", "field_type": "text", "required": True},
+    {"name": "language", "label": "Language (en/de)", "field_type": "text", "required": True},
+    {"name": "population", "label": "Population (display)", "field_type": "text", "required": False},
+    {"name": "padel_context", "label": "Padel Market Context (1-2 sentences)", "field_type": "text", "required": True},
+    {"name": "currency_note", "label": "Currency Disclaimer (non-EUR markets)", "field_type": "text", "required": False},
+    # --- Calc overrides (names must match DEFAULTS keys) ---
+    {"name": "venue", "label": "Venue Type (indoor/outdoor)", "field_type": "text", "required": False},
+    {"name": "own", "label": "Ownership (rent/buy)", "field_type": "text", "required": False},
+    {"name": "dblCourts", "label": "Double Courts", "field_type": "number", "required": False},
+    {"name": "sglCourts", "label": "Single Courts", "field_type": "number", "required": False},
+    {"name": "ratePeak", "label": "Peak Rate (EUR/hr)", "field_type": "number", "required": False},
+    {"name": "rateOffPeak", "label": "Off-Peak Rate (EUR/hr)", "field_type": "number", "required": False},
+    {"name": "rentSqm", "label": "Commercial Rent (EUR/sqm/month)", "field_type": "number", "required": False},
+    {"name": "electricity", "label": "Electricity (EUR/month)", "field_type": "number", "required": False},
+    {"name": "heating", "label": "Heating (EUR/month)", "field_type": "number", "required": False},
+    {"name": "staff", "label": "Staff Cost (EUR/month)", "field_type": "number", "required": False},
+    {"name": "permitsCompliance", "label": "Permits & Compliance (EUR)", "field_type": "number", "required": False},
+    {"name": "utilTarget", "label": "Utilisation Target (%)", "field_type": "number", "required": False},
+]
+
+# =============================================================================
+# Article body templates (Jinja2 Markdown).
+# Uses only standard Jinja2 built-in filters — no custom extensions.
+# [scenario:slug:section] markers are replaced with rendered HTML cards
+# at generation time by bake_scenario_cards().
+# =============================================================================
+
+_EN_BODY = """\
+{{ padel_context }}
+
+This analysis models a **{{ dblCourts }}-double + {{ sglCourts }}-single court indoor facility** \
+using local market data for {{ city }}, {{ country_name }}.
+{% if currency_note %}
+> **Note:** {{ currency_note }}
+{% endif %}
+## Investment Overview
+
+[scenario:{{ scenario_slug }}]
+
+## Capital Expenditure Breakdown
+
+[scenario:{{ scenario_slug }}:capex]
+
+Court equipment, installation, and fit-out are the primary cost drivers. \
+In {{ city }}, commercial property rents at approximately €{{ rentSqm }}/sqm per month. \
+Permits and regulatory compliance for a {{ country_name }} venue total €{{ permitsCompliance | int }}.
+
+## Revenue Model & Operating Costs
+
+[scenario:{{ scenario_slug }}:operating]
+
+At a peak rate of €{{ ratePeak }}/hour and off-peak at €{{ rateOffPeak }}/hour, \
+with a {{ utilTarget }}% utilisation target, the model above shows the steady-state monthly \
+P&L once the initial ramp-up period is complete.
+
+## 5-Year Cash Flow Projection
+
+[scenario:{{ scenario_slug }}:cashflow]
+
+The projection accounts for a 12-month ramp-up curve as the venue builds its customer base. \
+The cumulative cash flow column shows when the investment turns cash-positive.
+
+## Returns & Exit Analysis
+
+[scenario:{{ scenario_slug }}:returns]
+
+Return metrics reflect a 5-year hold period with exit valued at a multiple of stabilised EBITDA — \
+a standard assumption in padel and leisure real estate transactions across {{ country_name }}.
+
+## Key Takeaways for {{ city }}
+
+- **Commercial rent:** €{{ rentSqm }}/sqm per month — {% if rentSqm | float >= 6 %}above{% elif rentSqm | float <= 3.5 %}below{% else %}near{% endif %} the European average for padel facilities
+- **Peak court rate:** €{{ ratePeak }}/hour reflects local demand and competitive positioning
+- **Utilisation target:** {{ utilTarget }}% — achievable for a well-located {{ city }} venue in its second year
+- **Permit costs:** €{{ permitsCompliance | int }} — representative of the {{ country_name }} regulatory environment
+
+## Model Your Own {{ city }} Scenario
+
+Every market is different. Use the free Padelnomics financial planner to adjust court count, \
+pricing, rent, financing terms, and see how the numbers change in real time.\
+"""
+
+_DE_BODY = """\
+{{ padel_context }}
+
+Diese Analyse modelliert eine **{{ dblCourts }} Doppel- + {{ sglCourts }} Einzelcourt-Innenhalle** \
+auf Basis lokaler Marktdaten für {{ city }}, {{ country_name }}.
+{% if currency_note %}
+> **Hinweis:** {{ currency_note }}
+{% endif %}
+## Investitionsübersicht
+
+[scenario:{{ scenario_slug }}]
+
+## Investitionskosten (CAPEX)
+
+[scenario:{{ scenario_slug }}:capex]
+
+Courtausstattung, Installation und Innenausbau sind die größten Kostentreiber. \
+In {{ city }} liegen Gewerbeimmobilien bei ca. €{{ rentSqm }}/m² pro Monat. \
+Genehmigungen und Compliance für eine {{ country_name }}er Anlage belaufen sich auf €{{ permitsCompliance | int }}.
+
+## Umsatzmodell & Betriebskosten
+
+[scenario:{{ scenario_slug }}:operating]
+
+Bei einem Peak-Preis von €{{ ratePeak }}/Stunde und Off-Peak von €{{ rateOffPeak }}/Stunde \
+sowie einem Auslastungsziel von {{ utilTarget }}% zeigt das Modell die monatliche GuV \
+nach Abschluss der Anlaufphase.
+
+## 5-Jahres-Cashflow-Projektion
+
+[scenario:{{ scenario_slug }}:cashflow]
+
+Die Projektion berücksichtigt eine 12-monatige Anlaufkurve, während die Anlage ihren Kundenstamm aufbaut. \
+Die kumulative Cashflow-Spalte zeigt, wann die Investition den Break-even erreicht.
+
+## Rendite- & Exit-Analyse
+
+[scenario:{{ scenario_slug }}:returns]
+
+Die Renditekennzahlen basieren auf einem 5-Jahres-Haltezeitraum, wobei der Exit auf einem Vielfachen \
+des stabilisierten EBITDA bewertet wird — eine gängige Annahme bei Padel- und Freizeitimmobilien in {{ country_name }}.
+
+## Fazit für {{ city }}
+
+- **Gewerbemiete:** €{{ rentSqm }}/m²/Monat — {% if rentSqm | float >= 6 %}über{% elif rentSqm | float <= 3.5 %}unter{% else %}um{% endif %} dem europäischen Durchschnitt für Padelanlagen
+- **Peak-Courtpreis:** €{{ ratePeak }}/Stunde entspricht der lokalen Nachfrage und Marktpositionierung
+- **Auslastungsziel:** {{ utilTarget }}% — erreichbar für eine gut gelegene {{ city }}er Anlage im zweiten Betriebsjahr
+- **Genehmigungskosten:** €{{ permitsCompliance | int }} — repräsentativ für das {{ country_name }}e Regulierungsumfeld
+
+## Ihr eigenes {{ city }}-Szenario modellieren
+
+Jeder Markt ist anders. Nutzen Sie den kostenlosen Padelnomics Finanzplaner, um Courtanzahl, \
+Preise, Miete und Finanzierungskonditionen anzupassen und die Zahlen in Echtzeit zu sehen.\
+"""
+
+TEMPLATES = [
+    {
+        "name": "City Padel Cost Analysis (EN)",
+        "slug": "city-padel-cost-en",
+        "content_type": "calculator",
+        "input_schema": json.dumps(INPUT_SCHEMA),
+        "url_pattern": "/padel-cost/{{ city_slug }}",
+        "title_pattern": "Padel Court Cost in {{ city }}, {{ country_name }} — Investment Analysis 2026",
+        "meta_description_pattern": (
+            "How much does it cost to open a padel center in {{ city }}? "
+            "Full investment breakdown: CAPEX, revenue model, and ROI analysis "
+            "for a {{ dblCourts }}+{{ sglCourts }} court indoor venue."
+        ),
+        "body_template": _EN_BODY,
+    },
+    {
+        "name": "City Padel Cost Analysis (DE)",
+        "slug": "city-padel-cost-de",
+        "content_type": "calculator",
+        "input_schema": json.dumps(INPUT_SCHEMA),
+        "url_pattern": "/padel-kosten/{{ city_slug }}",
+        "title_pattern": "Padelhalle Kosten {{ city }}, {{ country_name }} — Investitionsanalyse 2026",
+        "meta_description_pattern": (
+            "Was kostet es, eine Padelhalle in {{ city }} zu eröffnen? "
+            "Vollständige Investitionsanalyse: CAPEX, Umsatzmodell und Rendite "
+            "für eine {{ dblCourts }}+{{ sglCourts }} Court Innenhalle."
+        ),
+        "body_template": _DE_BODY,
+    },
+]
+
+# =============================================================================
+# City data.
+# Each entry generates two template_data rows — one per template (EN + DE).
+# Fields matching calculator DEFAULTS keys become calc overrides at generation.
+# =============================================================================
+
+# Currency note used for all non-EUR markets
+_EUR_NOTE_EN = (
+    "All projections are modelled in EUR for cross-market comparability. "
+    "Use the planner to adjust inputs for local currency costs."
+)
+_EUR_NOTE_DE = (
+    "Alle Projektionen sind in EUR für den Marktvergleich dargestellt. "
+    "Nutzen Sie den Planer, um Eingaben auf lokale Währungskosten anzupassen."
+)
+
+CITIES = [
+    # ------------------------------------------------------------------ Germany
+    {
+        "city": "Berlin",
+        "city_slug_en": "berlin",
+        "city_slug_de": "berlin",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "3.6M",
+        "padel_context_en": (
+            "Berlin is Germany's leading padel market, with growing demand driven by "
+            "a young, sports-active population and a dense network of sports facilities. "
+            "The city's large commercial real estate stock keeps rents moderate relative "
+            "to Munich or Frankfurt."
+        ),
+        "padel_context_de": (
+            "Berlin ist Deutschlands führender Padelmarkt mit wachsender Nachfrage, "
+            "getrieben von einer jungen, sportbegeisterten Bevölkerung und einem dichten "
+            "Netz an Sportanlagen. Das große Gewerbeimmobilienangebot hält die Mieten "
+            "moderat im Vergleich zu München oder Frankfurt."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 50, "rateOffPeak": 35,
+        "rentSqm": 5, "electricity": 650, "heating": 450,
+        "staff": 2000, "permitsCompliance": 12000, "utilTarget": 40,
+    },
+    {
+        "city": "Munich",
+        "city_slug_en": "munich",
+        "city_slug_de": "muenchen",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "1.5M",
+        "padel_context_en": (
+            "Munich is Germany's highest-spending padel market. Its affluent, "
+            "sports-oriented population supports premium court rates, and the city "
+            "already hosts over a dozen padel facilities with strong year-round demand."
+        ),
+        "padel_context_de": (
+            "München ist Deutschlands umsatzstärkster Padelmarkt. Die kaufkräftige, "
+            "sportbegeisterte Bevölkerung unterstützt Premium-Courtpreise, und die "
+            "Stadt beherbergt bereits mehr als ein Dutzend Padelanlagen mit starker "
+            "ganzjähriger Nachfrage."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 60, "rateOffPeak": 42,
+        "rentSqm": 7, "electricity": 750, "heating": 500,
+        "staff": 2500, "permitsCompliance": 15000, "utilTarget": 45,
+    },
+    {
+        "city": "Hamburg",
+        "city_slug_en": "hamburg",
+        "city_slug_de": "hamburg",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "1.9M",
+        "padel_context_en": (
+            "Hamburg has seen rapid padel growth, fuelled by its large expatriate "
+            "community and proximity to the Scandinavian padel tradition. "
+            "Commercial rents in suitable industrial-conversion zones remain attractive."
+        ),
+        "padel_context_de": (
+            "Hamburg verzeichnet ein rasantes Padelwachstum, angetrieben durch seine "
+            "große Expat-Gemeinde und die Nähe zur skandinavischen Padeltradition. "
+            "Gewerbeimmobilienmieten in geeigneten Industriekonversionszonen "
+            "bleiben attraktiv."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 55, "rateOffPeak": 38,
+        "rentSqm": 6, "electricity": 700, "heating": 500,
+        "staff": 2200, "permitsCompliance": 13000, "utilTarget": 42,
+    },
+    {
+        "city": "Frankfurt",
+        "city_slug_en": "frankfurt",
+        "city_slug_de": "frankfurt",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "760K",
+        "padel_context_en": (
+            "Frankfurt's financial sector workforce and high disposable incomes make it "
+            "a natural fit for padel. The city's compact size means a smaller but highly "
+            "engaged target market with premium spending power."
+        ),
+        "padel_context_de": (
+            "Frankfurts Finanzsektor-Belegschaft und hohes verfügbares Einkommen machen "
+            "die Stadt zu einem natürlichen Padelstandort. Die kompakte Größe der Stadt "
+            "bedeutet einen kleineren, aber hochengagierten Zielmarkt mit Premium-Kaufkraft."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 4, "sglCourts": 1,
+        "ratePeak": 58, "rateOffPeak": 40,
+        "rentSqm": 7, "electricity": 700, "heating": 480,
+        "staff": 2400, "permitsCompliance": 14000, "utilTarget": 43,
+    },
+    {
+        "city": "Cologne",
+        "city_slug_en": "cologne",
+        "city_slug_de": "koeln",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "1.1M",
+        "padel_context_en": (
+            "Cologne is an emerging padel market with several new clubs opening "
+            "in the past two years. The city's large student population and active "
+            "sports culture create a broad potential customer base."
+        ),
+        "padel_context_de": (
+            "Köln ist ein aufstrebender Padelmarkt, in dem in den letzten zwei Jahren "
+            "mehrere neue Clubs eröffnet haben. Die große Studentenschaft und aktive "
+            "Sportkultur der Stadt schaffen eine breite potenzielle Kundenbasis."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 48, "rateOffPeak": 34,
+        "rentSqm": 4.5, "electricity": 620, "heating": 420,
+        "staff": 1800, "permitsCompliance": 11000, "utilTarget": 38,
+    },
+    {
+        "city": "Düsseldorf",
+        "city_slug_en": "dusseldorf",
+        "city_slug_de": "duesseldorf",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "640K",
+        "padel_context_en": (
+            "Düsseldorf's fashion and business community has embraced padel as a "
+            "networking sport. Several corporate-backed clubs are already operating, "
+            "indicating strong B2B membership potential."
+        ),
+        "padel_context_de": (
+            "Düsseldorfs Mode- und Geschäftswelt hat Padel als Networking-Sport angenommen. "
+            "Mehrere unternehmensgestützte Clubs sind bereits in Betrieb, "
+            "was auf ein starkes B2B-Mitgliedschaftspotenzial hinweist."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 3, "sglCourts": 2,
+        "ratePeak": 52, "rateOffPeak": 36,
+        "rentSqm": 5.5, "electricity": 660, "heating": 440,
+        "staff": 2100, "permitsCompliance": 12000, "utilTarget": 40,
+    },
+    {
+        "city": "Stuttgart",
+        "city_slug_en": "stuttgart",
+        "city_slug_de": "stuttgart",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "630K",
+        "padel_context_en": (
+            "Stuttgart's engineering and automotive workforce has strong disposable "
+            "income and a culture of team sports. The city's hilly terrain limits "
+            "outdoor options, making indoor padel particularly attractive."
+        ),
+        "padel_context_de": (
+            "Stuttgarts Ingenieur- und Automobilbelegschaft verfügt über hohes "
+            "verfügbares Einkommen und eine Kultur des Teamsports. Die hügelige "
+            "Topografie der Stadt schränkt Outdoor-Optionen ein und macht Indoor-Padel "
+            "besonders attraktiv."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 4, "sglCourts": 1,
+        "ratePeak": 55, "rateOffPeak": 38,
+        "rentSqm": 6, "electricity": 680, "heating": 460,
+        "staff": 2300, "permitsCompliance": 13000, "utilTarget": 42,
+    },
+    {
+        "city": "Leipzig",
+        "city_slug_en": "leipzig",
+        "city_slug_de": "leipzig",
+        "country": "DE",
+        "country_name_en": "Germany",
+        "country_name_de": "Deutschland",
+        "region": "Europe",
+        "population": "600K",
+        "padel_context_en": (
+            "Leipzig offers the most cost-effective padel entry point in Germany. "
+            "Low commercial rents and a growing young professional population make it "
+            "attractive for first-mover operators willing to build the market."
+        ),
+        "padel_context_de": (
+            "Leipzig bietet den kosteneffizientesten Padeleinstieg in Deutschland. "
+            "Niedrige Gewerbemieten und eine wachsende junge Berufsschicht machen es "
+            "attraktiv für Erstanbieter, die bereit sind, den Markt aufzubauen."
+        ),
+        "currency_note_en": "",
+        "currency_note_de": "",
+        "dblCourts": 3, "sglCourts": 2,
+        "ratePeak": 42, "rateOffPeak": 30,
+        "rentSqm": 3.5, "electricity": 550, "heating": 400,
+        "staff": 1500, "permitsCompliance": 10000, "utilTarget": 35,
+    },
+    # ------------------------------------------------------------------ USA
+    {
+        "city": "Miami",
+        "city_slug_en": "miami",
+        "city_slug_de": "miami",
+        "country": "US",
+        "country_name_en": "USA",
+        "country_name_de": "USA",
+        "region": "North America",
+        "population": "440K (metro 6.1M)",
+        "padel_context_en": (
+            "Miami leads the US padel boom, fuelled by its large Latin American community "
+            "and year-round warm weather. The city has more than 30 operating courts "
+            "and demand continues to outstrip supply."
+        ),
+        "padel_context_de": (
+            "Miami führt den US-Padelboom an, angetrieben durch seine große "
+            "lateinamerikanische Gemeinschaft und das ganzjährig warme Wetter. "
+            "Die Stadt hat mehr als 30 aktive Courts und die Nachfrage übersteigt "
+            "weiterhin das Angebot."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 5, "sglCourts": 2,
+        "ratePeak": 70, "rateOffPeak": 50,
+        "rentSqm": 3.5, "electricity": 800, "heating": 100,
+        "staff": 3500, "permitsCompliance": 20000, "utilTarget": 45,
+    },
+    {
+        "city": "New York",
+        "city_slug_en": "new-york",
+        "city_slug_de": "new-york",
+        "country": "US",
+        "country_name_en": "USA",
+        "country_name_de": "USA",
+        "region": "North America",
+        "population": "8.3M",
+        "padel_context_en": (
+            "New York City is the highest-cost padel market in North America, with premium "
+            "rates justified by extreme demand. Early movers are achieving 80%+ utilisation, "
+            "driving strong investor interest in new capacity."
+        ),
+        "padel_context_de": (
+            "New York City ist der teuerste Padelmarkt Nordamerikas, mit Premium-Preisen "
+            "gerechtfertigt durch extreme Nachfrage. Frühe Markteinsteiger erzielen über "
+            "80% Auslastung und treiben starkes Investoreninteresse an neuen Kapazitäten."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 4, "sglCourts": 1,
+        "ratePeak": 80, "rateOffPeak": 58,
+        "rentSqm": 8, "electricity": 900, "heating": 600,
+        "staff": 5000, "permitsCompliance": 30000, "utilTarget": 50,
+    },
+    {
+        "city": "Los Angeles",
+        "city_slug_en": "los-angeles",
+        "city_slug_de": "los-angeles",
+        "country": "US",
+        "country_name_en": "USA",
+        "country_name_de": "USA",
+        "region": "North America",
+        "population": "3.9M",
+        "padel_context_en": (
+            "Los Angeles combines a large Hispanic community, a wellness-oriented culture, "
+            "and year-round outdoor lifestyle to create one of the fastest-growing padel "
+            "markets in the country. Several celebrity-backed clubs have boosted visibility."
+        ),
+        "padel_context_de": (
+            "Los Angeles kombiniert eine große hispanische Gemeinschaft, eine "
+            "wellnessorientierte Kultur und einen ganzjährigen Outdoor-Lebensstil zu einem "
+            "der am schnellsten wachsenden Padelmärkte des Landes. "
+            "Mehrere prominentengestützte Clubs haben die Bekanntheit gesteigert."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 5, "sglCourts": 2,
+        "ratePeak": 75, "rateOffPeak": 55,
+        "rentSqm": 5, "electricity": 750, "heating": 150,
+        "staff": 4000, "permitsCompliance": 25000, "utilTarget": 48,
+    },
+    {
+        "city": "Dallas",
+        "city_slug_en": "dallas",
+        "city_slug_de": "dallas",
+        "country": "US",
+        "country_name_en": "USA",
+        "country_name_de": "USA",
+        "region": "North America",
+        "population": "1.3M",
+        "padel_context_en": (
+            "Dallas offers one of the most affordable commercial real estate environments "
+            "for padel in the US, combined with a growing Hispanic population and strong "
+            "sports culture. Several clubs are already operational in the metro area."
+        ),
+        "padel_context_de": (
+            "Dallas bietet eines der günstigsten Gewerbeimmobilienumfelder für Padel "
+            "in den USA, kombiniert mit einer wachsenden hispanischen Bevölkerung und "
+            "starker Sportkultur. Mehrere Clubs sind bereits in der Metropolregion aktiv."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 55, "rateOffPeak": 40,
+        "rentSqm": 3, "electricity": 700, "heating": 200,
+        "staff": 2800, "permitsCompliance": 15000, "utilTarget": 40,
+    },
+    {
+        "city": "Austin",
+        "city_slug_en": "austin",
+        "city_slug_de": "austin",
+        "country": "US",
+        "country_name_en": "USA",
+        "country_name_de": "USA",
+        "region": "North America",
+        "population": "960K",
+        "padel_context_en": (
+            "Austin's tech-affluent, fitness-obsessed demographic is an ideal fit "
+            "for padel. The city's rapid population growth and lack of established "
+            "padel venues creates a significant first-mover opportunity."
+        ),
+        "padel_context_de": (
+            "Austins technikaffine, fitnessbegeisterte Bevölkerung passt ideal zu Padel. "
+            "Das schnelle Bevölkerungswachstum und die fehlenden etablierten Padelanlagen "
+            "schaffen eine erhebliche First-Mover-Chance."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 55, "rateOffPeak": 38,
+        "rentSqm": 3, "electricity": 700, "heating": 150,
+        "staff": 2500, "permitsCompliance": 12000, "utilTarget": 42,
+    },
+    {
+        "city": "Chicago",
+        "city_slug_en": "chicago",
+        "city_slug_de": "chicago",
+        "country": "US",
+        "country_name_en": "USA",
+        "country_name_de": "USA",
+        "region": "North America",
+        "population": "2.7M",
+        "padel_context_en": (
+            "Chicago's large Hispanic community and established racquet sports culture "
+            "make it a natural padel market. The harsh winters drive demand for "
+            "indoor facilities, reducing the outdoor competition that affects "
+            "warmer-climate markets."
+        ),
+        "padel_context_de": (
+            "Chicagos große hispanische Gemeinschaft und etablierte Schlägertsportkultur "
+            "machen es zu einem natürlichen Padelmarkt. Die harten Winter treiben die "
+            "Nachfrage nach Innenhallen und reduzieren den Outdoor-Wettbewerb, "
+            "der wärmere Märkte beeinflusst."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 60, "rateOffPeak": 42,
+        "rentSqm": 4, "electricity": 750, "heating": 550,
+        "staff": 3200, "permitsCompliance": 18000, "utilTarget": 38,
+    },
+    # ------------------------------------------------------------------ UK
+    {
+        "city": "London",
+        "city_slug_en": "london",
+        "city_slug_de": "london",
+        "country": "GB",
+        "country_name_en": "UK",
+        "country_name_de": "Großbritannien",
+        "region": "Europe",
+        "population": "8.8M",
+        "padel_context_en": (
+            "London is the UK's most established padel market, with premium clubs "
+            "operating in affluent areas. High commercial rents are offset by "
+            "the city's exceptional spending power and the sport's growing social cachet."
+        ),
+        "padel_context_de": (
+            "London ist der etablierteste Padelmarkt Großbritanniens, mit Premium-Clubs "
+            "in wohlhabenden Stadtteilen. Hohe Gewerbemieten werden durch die "
+            "außergewöhnliche Kaufkraft der Stadt und den wachsenden sozialen Status "
+            "des Sports ausgeglichen."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 65, "rateOffPeak": 45,
+        "rentSqm": 7, "electricity": 800, "heating": 500,
+        "staff": 3500, "permitsCompliance": 15000, "utilTarget": 45,
+    },
+    {
+        "city": "Manchester",
+        "city_slug_en": "manchester",
+        "city_slug_de": "manchester",
+        "country": "GB",
+        "country_name_en": "UK",
+        "country_name_de": "Großbritannien",
+        "region": "Europe",
+        "population": "550K (metro 2.8M)",
+        "padel_context_en": (
+            "Manchester's strong sports culture, large student population, and "
+            "lower commercial rents versus London make it an attractive second city "
+            "for padel investment, with several clubs already gaining strong membership."
+        ),
+        "padel_context_de": (
+            "Manchesters starke Sportkultur, große Studentenschaft und niedrigere "
+            "Gewerbemieten gegenüber London machen es zu einer attraktiven zweiten "
+            "Stadt für Padelinvestitionen, mit mehreren Clubs, die bereits starke "
+            "Mitgliederzahlen aufbauen."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 4, "sglCourts": 2,
+        "ratePeak": 50, "rateOffPeak": 35,
+        "rentSqm": 4.5, "electricity": 650, "heating": 450,
+        "staff": 2200, "permitsCompliance": 10000, "utilTarget": 40,
+    },
+    {
+        "city": "Edinburgh",
+        "city_slug_en": "edinburgh",
+        "city_slug_de": "edinburgh",
+        "country": "GB",
+        "country_name_en": "UK",
+        "country_name_de": "Großbritannien",
+        "region": "Europe",
+        "population": "540K",
+        "padel_context_en": (
+            "Edinburgh is an early-stage padel market with significant first-mover "
+            "potential. Its affluent professional population, university community, "
+            "and lack of existing padel supply create a compelling entry opportunity."
+        ),
+        "padel_context_de": (
+            "Edinburgh ist ein Frühphasen-Padelmarkt mit erheblichem First-Mover-Potenzial. "
+            "Die wohlhabende Berufsschicht, Universitätsgemeinde und fehlende bestehende "
+            "Padeliversorgung schaffen eine überzeugende Einstiegsmöglichkeit."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 3, "sglCourts": 2,
+        "ratePeak": 48, "rateOffPeak": 33,
+        "rentSqm": 4, "electricity": 620, "heating": 480,
+        "staff": 2000, "permitsCompliance": 9000, "utilTarget": 38,
+    },
+    {
+        "city": "Birmingham",
+        "city_slug_en": "birmingham",
+        "city_slug_de": "birmingham",
+        "country": "GB",
+        "country_name_en": "UK",
+        "country_name_de": "Großbritannien",
+        "region": "Europe",
+        "population": "1.1M",
+        "padel_context_en": (
+            "Birmingham's large and diverse population, strong sports heritage, "
+            "and relatively affordable commercial property make it one of the UK's "
+            "most promising regional padel markets outside London."
+        ),
+        "padel_context_de": (
+            "Birminghams große und vielfältige Bevölkerung, starkes Sporterbe und "
+            "relativ erschwingliche Gewerbeimmobilien machen es zu einem der "
+            "vielversprechendsten regionalen Padelmärkte Großbritanniens außerhalb Londons."
+        ),
+        "currency_note_en": _EUR_NOTE_EN,
+        "currency_note_de": _EUR_NOTE_DE,
+        "dblCourts": 4, "sglCourts": 1,
+        "ratePeak": 48, "rateOffPeak": 34,
+        "rentSqm": 4, "electricity": 630, "heating": 440,
+        "staff": 2100, "permitsCompliance": 10000, "utilTarget": 38,
+    },
+]
+
+# Calc fields that get passed to the financial model (must match DEFAULTS keys)
+_CALC_FIELDS = {
+    "venue", "own", "country",
+    "dblCourts", "sglCourts",
+    "ratePeak", "rateOffPeak",
+    "rentSqm", "electricity", "heating", "staff",
+    "permitsCompliance", "utilTarget",
+}
+
+
+def _build_row(city: dict, lang: str) -> dict:
+    """Build a template_data data_json dict for one city + language."""
+    is_de = lang == "de"
+    row = {
+        "city": city["city"],
+        "city_slug": city["city_slug_de"] if is_de else city["city_slug_en"],
+        "country": city["country"],
+        "country_name": city["country_name_de"] if is_de else city["country_name_en"],
+        "region": city["region"],
+        "language": lang,
+        "population": city.get("population", ""),
+        "padel_context": city["padel_context_de"] if is_de else city["padel_context_en"],
+        "currency_note": city.get("currency_note_de" if is_de else "currency_note_en", ""),
+        "venue": "indoor",
+        "own": "rent",
+        "dblCourts": city["dblCourts"],
+        "sglCourts": city["sglCourts"],
+        "ratePeak": city["ratePeak"],
+        "rateOffPeak": city["rateOffPeak"],
+        "rentSqm": city["rentSqm"],
+        "electricity": city["electricity"],
+        "heating": city["heating"],
+        "staff": city["staff"],
+        "permitsCompliance": city["permitsCompliance"],
+        "utilTarget": city["utilTarget"],
+    }
+    return row
+
+
+# =============================================================================
+# Seed logic (synchronous sqlite3)
+# =============================================================================
+
+def seed_templates(conn: sqlite3.Connection) -> dict[str, int]:
+    """Insert article templates if they don't exist. Returns {slug: id} map."""
+    template_ids: dict[str, int] = {}
+
+    for tmpl in TEMPLATES:
+        existing = conn.execute(
+            "SELECT id FROM article_templates WHERE slug = ?", (tmpl["slug"],)
+        ).fetchone()
+
+        if existing:
+            print(f"  Template '{tmpl['slug']}' already exists (id={existing[0]}), skipping.")
+            template_ids[tmpl["slug"]] = existing[0]
+        else:
+            cur = conn.execute(
+                """INSERT INTO article_templates
+                   (name, slug, content_type, input_schema,
+                    url_pattern, title_pattern, meta_description_pattern, body_template)
+                   VALUES (?, ?, ?, ?, ?, ?, ?, ?)""",
+                (
+                    tmpl["name"],
+                    tmpl["slug"],
+                    tmpl["content_type"],
+                    tmpl["input_schema"],
+                    tmpl["url_pattern"],
+                    tmpl["title_pattern"],
+                    tmpl["meta_description_pattern"],
+                    tmpl["body_template"],
+                ),
+            )
+            template_ids[tmpl["slug"]] = cur.lastrowid
+            print(f"  Created template '{tmpl['slug']}' (id={cur.lastrowid})")
+
+    return template_ids
+
+
+def seed_data_rows(conn: sqlite3.Connection, template_ids: dict[str, int]) -> int:
+    """Insert template_data rows for all cities × languages. Returns count inserted."""
+    now = __import__("datetime").datetime.utcnow().isoformat()
+    inserted = 0
+
+    en_id = template_ids.get("city-padel-cost-en")
+    de_id = template_ids.get("city-padel-cost-de")
+
+    for city in CITIES:
+        for lang, tmpl_id in [("en", en_id), ("de", de_id)]:
+            row_data = _build_row(city, lang)
+            data_json = json.dumps(row_data)
+            city_slug = row_data["city_slug"]
+
+            # Check for existing row by matching city_slug inside data_json
+            existing = conn.execute(
+                """SELECT id FROM template_data
+                   WHERE template_id = ?
+                   AND json_extract(data_json, '$.city_slug') = ?""",
+                (tmpl_id, city_slug),
+            ).fetchone()
+
+            if existing:
+                print(f"  Data row '{city_slug}' ({lang}) already exists, skipping.")
+            else:
+                conn.execute(
+                    """INSERT INTO template_data (template_id, data_json, created_at)
+                       VALUES (?, ?, ?)""",
+                    (tmpl_id, data_json, now),
+                )
+                inserted += 1
+                print(f"  Inserted data row '{city_slug}' ({lang})")
+
+    return inserted
+
+
+# =============================================================================
+# Async generation (bootstraps the DB layer without full Quart app context)
+# =============================================================================
+
+async def generate_articles(template_ids: dict[str, int]) -> None:
+    from padelnomics.admin.routes import _generate_from_template  # noqa: PLC0415
+    from padelnomics.core import close_db, fetch_one, init_db
+
+    print("\nInitialising database connection...")
+    await init_db(DATABASE_PATH)
+
+    start_date = date.today() - timedelta(days=30)  # backdate so all are immediately live
+
+    for slug, tmpl_id in template_ids.items():
+        template = await fetch_one("SELECT * FROM article_templates WHERE id = ?", (tmpl_id,))
+        assert template is not None, f"Template '{slug}' not found in DB"
+
+        print(f"\nGenerating articles for template '{slug}'...")
+        count = await _generate_from_template(template, start_date, articles_per_day=3)
+        print(f"  Generated {count} articles.")
+
+    await close_db()
+
+
+# =============================================================================
+# Entry point
+# =============================================================================
+
+def main() -> None:
+    assert Path(DATABASE_PATH).exists(), (
+        f"Database not found at {DATABASE_PATH!r}. "
+        "Run migrations first: uv run python -m padelnomics.migrations"
+    )
+
+    conn = sqlite3.connect(DATABASE_PATH)
+    conn.execute("PRAGMA journal_mode=WAL")
+    conn.execute("PRAGMA foreign_keys=ON")
+    conn.row_factory = sqlite3.Row
+
+    print("Seeding article templates...")
+    template_ids = seed_templates(conn)
+
+    print("\nSeeding city data rows...")
+    inserted = seed_data_rows(conn, template_ids)
+    conn.commit()
+    conn.close()
+
+    print(f"\nDone. {inserted} data rows inserted.")
+    print("Templates and data rows are visible in admin → Templates.")
+
+    if "--generate" in sys.argv:
+        print("\nRunning article generation pipeline...")
+        asyncio.run(generate_articles(template_ids))
+        print("\nGeneration complete. Check admin → Articles.")
+    else:
+        print(
+            "\nTo generate articles, either:\n"
+            "  1. Run: uv run python -m padelnomics.scripts.seed_content --generate\n"
+            "  2. Or visit admin → Templates → (template) → Generate"
+        )
+
+
+if __name__ == "__main__":
+    main()