International ASO guide

App Store localization checklist

Good store localization does more than translate copy. It connects local search language, product positioning, graphics, support, and the languages actually available in the app.

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18 minute readEdited and source-checked by Rene DresselEditorial policy
An app store product page localized deliberately for several languages and markets
Store localization is more than translation. It combines local search language, clear positioning, suitable screenshots, public support pages, and an app whose actual language matches the promise.
TL;DR

The short answer

Store localization is more than translation. It combines local search language, clear positioning, suitable screenshots, public support pages, and an app whose actual language matches the promise.

  • Prioritize markets by product and support readiness, localize each field for its store role, and review fallbacks, graphics, URLs, and conversion per locale.

Evidence required for release

Do not review store localization and international listings as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Keep three evidence layers separate for store localization and international listings: statically visible project configuration, behavior on a clean device, and external settings in Apple Developer, App Store Connect, or Play Console. The review is reliable only when those layers describe the same release candidate. Give every mismatch an owner and a stop condition instead of assuming a default will be correct.

Evidence required for release

  • Production value for prioritize markets identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

1. Prioritize markets

Choose languages by demand, product fit, legal availability, support, and actual app localization rather than maximum count.

Do not review prioritize markets as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for prioritize markets identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

2. Separate store and app language

Localized metadata does not change the binary language. The listing cannot promise a fully localized experience that the app lacks.

Do not review separate store and app language as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for separate store and app language identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

3. Understand primary language and fallback

Document which locale Apple and Google display when translation is missing or language and country preference differ.

Do not review understand primary language and fallback as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for understand primary language and fallback identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

4. Write fields for their role

Name, subtitle, short description, full description, and keywords have distinct purposes and limits.

Do not review write fields for their role as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for write fields for their role identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

5. Research local search language

Use phrases target users actually choose without stuffing or unsupported market claims.

Do not review research local search language as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for research local search language identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

6. Adapt graphics and screenshots

In-image text, currency, dates, device views, and shown functions must match the market and current build.

Do not review adapt graphics and screenshots as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for adapt graphics and screenshots identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

7. Localize public pages

Privacy, support, account deletion, and marketing URLs must be reachable, comprehensible, and consistent.

Do not review localize public pages as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for localize public pages identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

8. Measure quality and impact

Use native review, test truncation, and assess impressions, product-page views, conversion, activation, and support demand.

Do not review measure quality and impact as an isolated switch. Connect it to store localization and international listings, the signed production artifact, and the values in the store console. Record which file produces the setting, whether a framework or plugin can alter it during the build, and how you inspected the resolved value. A plausible entry in source control does not prove that the uploaded binary contains the same configuration.

Evidence required for release

  • Production value for measure quality and impact identified
  • Responsible project file or store setting linked
  • Resolved native configuration inspected
  • Signed artifact checked on a clean device
  • iOS and Android differences recorded
  • Every mismatch has an owner and stop condition

Frequently asked questions

Must the app itself be localized?

A localized listing can exist separately but must not mislead users about the languages available in the app.

Should every language launch at once?

No. Start with markets the product, support, and legal setup can serve reliably.

Can screenshots be reused?

Only when language, functionality, and market context still fit. Localize text embedded in images.

What can the Store Listing Checker verify?

It can check fields, limits, duplicates, URLs, and graphic metadata. Language quality and cultural effect need human review.

Official primary sources

This article is based on the following official primary sources. Store rules can change, so verify the current version before every submission.