Apple publishes a table of App Store storefronts with a default language and any additional supported languages for each one (App Store Connect: App Store localizations). On Oct 13, 2026 it listed 175 storefronts; the United States, for example, has English (US) as default plus 9 additional languages, including Spanish (Mexico). Apple frames this table around which language customers see, not search indexing, so use it as a map of what to test, then verify with real rank checks.
The table, in numbers
From Apple's localization reference, parsed on Oct 13, 2026 (raw: `apple_storefront_languages.json`):
- 175 storefronts are listed.
- 135 of them use English (U.K.) as the default language; 16 use Spanish (Mexico).
- 105 storefronts list at least one additional language.
Storefronts worth knowing
| Storefront | Default language | Additional languages (Apple) |
|---|---|---|
| United States | English (US) | Arabic, Chinese (Simplified), Chinese (Traditional), French, Korean, Portuguese (Brazil), Russian, Spanish (Mexico), Vietnamese |
| United Kingdom | English (U.K.) | none |
| Canada | English (Canada) | French (Canada) |
| Germany | German | English (U.K.) |
| Switzerland | German | English (U.K.), French, Italian |
| Japan | Japanese | English (US) |
| Mexico | Spanish (Mexico) | English (U.K.) |
| Türkiye | English (U.K.) | Turkish |
| India | English (U.K.) | Bangla, Gujarati, Hindi, Kannada, Malayalam, Marathi, Odia, Punjabi, Tamil, Telugu, Urdu |
Two rows surprise people. Türkiye's default is English (U.K.), with Turkish as an additional language. Germany lists English (U.K.) as an additional language, so your UK English metadata is relevant there too.
Why this matters for keywords
Each localization in App Store Connect has its own name, subtitle and keyword field. If a storefront also reads an additional language's metadata, that localization is extra room for words. ASO practitioners widely report this for the US and Spanish (Mexico); we walk through that case, and how to check it worked, in Get a second 100-byte keyword field in the US App Store. Apple doesn't document that additional languages count for search ranking, and one ASO course puts it plainly: Apple's behavior "can change; do not rely on undocumented hacks" (Skarp).
Localize for people first
Real users read these fields. In our Oct 13, 2026 pull of the iTunes Search API, app 1438388363 was named "Habit Tracker" in the US and "Habit Tracker - Tagesplaner" in Germany, and app 1525179720 was "Budget Planner - ausgaben plan" in Germany. Developers mix English and local words where people search both. Research each market in its own language instead of translating your English keyword list.
How to test a localization
- Pick a few words that appear only in the new localization, not in your primary one.
- Ship the update.
- Check your rank for those words in the target storefront for the next couple of weeks.
- If they never rank, that language probably isn't helping search there. Move the words back.
FAQ
How many App Store storefronts does Apple list? Apple's localization reference listed 175 on Oct 13, 2026 (Apple).
Which languages does the US App Store support? English (US) by default, plus Arabic, Chinese (Simplified), Chinese (Traditional), French, Korean, Portuguese (Brazil), Russian, Spanish (Mexico) and Vietnamese, per Apple's table.
Does Apple confirm that additional languages are indexed for search? Not in that reference. It describes which language customers see. Test any keyword effect with rank checks.
Should I translate my keyword field literally? No. Research what people actually search in each language; direct translations are often not the terms people type.
Which language does the Türkiye storefront default to? English (U.K.), with Turkish as an additional language, according to Apple's table.
Testing a localization means checking ranks in specific countries for a few weeks. TrackASO tracks keywords per country in the cloud, with every tracked keyword is checked every night.