ASO GLOSSARY

App store localization

App store localization is the practice of adapting a store listing for each market you ship to — not just translating the words, but researching the keywords locals actually search, writing metadata that reads native, and surfacing the cultural and trust cues that matter in that country. Done well, it’s one of the highest-leverage moves in ASO: a properly localized listing can unlock entire markets where a translated one quietly fails.

Last updated June 2026 · Reviewed by the ASOScan team

Key takeaways
  • Localization adapts a listing to each market’s language, search behavior, and culture — not a word-for-word translation.
  • Users search the terms native speakers actually type, which are often structurally different from a translation of your keywords.
  • Native phrasing also signals quality; a listing that reads off to a native speaker hurts both trust and conversion.
  • Use language tiers — some markets need fully native metadata, some are bilingual, some search in English — and invest where the app genuinely fits.
  • iOS budgets metadata in UTF-8 bytes, so multi-byte languages (German, Japanese, Arabic) consume the title/subtitle/keyword-field limits faster.

Why translation underperforms localization

A machine-translated listing optimizes for the wrong target: it reproduces your source-language phrasing in another language, but app-store users don’t search the literal translation of your keywords — they search the terms native speakers actually type. The German term, the Brazilian-Portuguese term, and the Japanese term for the same concept are often structurally different from a translation, and the high-value keyword is the one locals use, not the one a translator picks.

Beyond keywords, native phrasing signals quality. A listing that reads slightly off to a native speaker erodes trust and conversion even when the app itself is good. Localization fixes both: the right keywords for ranking, and natural language for conversion.

Language tiers and where to invest

Not every market needs the same depth. A useful frame is language tiers: some markets need fully native metadata to compete, some are effectively bilingual (English performs acceptably alongside the local language), and some search primarily in English. Investing in deep localization for a market where you have no real product-market fit or compliance is wasted; concentrating it on the markets where the app genuinely works pays off.

The practical workflow is per-market keyword research → native (not translated) metadata → local trust and cultural cues, applied to the markets that matter most for your app. Depth in a few markets beats shallow translation across many.

FAQ

Frequently asked questions

Is app store localization just translation?

No. Translation reproduces your words in another language; localization researches the keywords locals actually search, writes metadata that reads native, and adapts cultural and trust cues. Users don’t search the literal translation of your keywords, so translation alone misses the high-value terms.

Which markets should I localize for first?

Prioritize the markets where your app is genuinely usable and (for sensitive categories) compliant, and where the local language is required to compete. Deep localization in a few high-fit markets beats shallow translation across many.

Do I need different keywords for each country?

Yes. Search behavior and vocabulary differ by market — the same concept maps to different high-value terms in different countries — so each market is its own keyword research problem.

Put this into practice.

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