App Store localization is not a translation project attached to ASO. It is a market decision that changes what customers can read, which localized keywords can help them search, what screenshots they evaluate, and what they expect after installation.
Apple says localized metadata can display based on the person’s App Store location, device language, the localizations you provide, and the app’s primary language. Users can search with localized keywords where the App Store supports that language. The result is useful coverage—but not a guaranteed one-language-to-one-country mapping.
The safe workflow is:
choose a ready market → research its intent → localize the full promise → verify display behavior → measure acquisition and product quality
Understand metadata localization and app localization
App Store metadata localization happens in App Store Connect. Product localization happens in the app binary and surrounding customer experience.
They can ship on different schedules, but users experience them together.
Metadata includes items such as:
- app name and subtitle;
- private keyword field;
- description and promotional text;
- screenshots and app previews;
- custom product pages;
- In-App Events and purchase metadata where applicable.
Product readiness includes:
- interface and content language;
- onboarding and permissions;
- pricing, subscription, tax, and currency context;
- support and help content;
- emails, notifications, and account recovery;
- legal, privacy, accessibility, and regional requirements.
A beautifully localized product page that opens an unusable first session can increase low-quality downloads and negative reviews.
Learn how Apple chooses what people see
If only the primary language exists, Apple displays it across countries and regions. When localizations are added, the visible version can depend on the user’s language settings, the storefront’s supported languages, available metadata, and the primary-language fallback.
Apple’s localization reference lists the default and additional supported languages for each country or region. Treat that table as an implementation input, not a demand forecast.
Before editing, record:
- primary language;
- existing metadata localizations;
- supported countries and regions;
- default and additional languages in the priority storefront;
- product binary languages;
- screenshot and preview localizations;
- custom product pages and their localized assets;
- known fallback paths.
Do not assume “US English,” “UK English,” “Spanish,” or “French” behaves identically everywhere it can display.
Choose markets from product evidence
Prioritize markets with a scorecard:
| Signal | What to inspect |
|---|---|
| Existing demand | downloads, product-page views, web interest, support contacts |
| Product quality | activation, retention, crashes, refunds, review themes |
| Commercial fit | pricing, proceeds, payer or subscriber behavior, payment expectations |
| Language readiness | app, content, onboarding, help, notifications, support |
| Search opportunity | local suggestions, competitors, category language, paid search terms |
| Operational fit | legal, moderation, content, customer support, release capacity |
Search popularity alone is not enough. A market can show demand while the product remains unready to serve it.
Select one or two initial markets the team can maintain. A long list of machine-translated fields is not a localization strategy.
Write a local market brief
For each market, define:
- the primary user and job;
- the local category and problem language;
- the strongest relevant product differentiator;
- direct and adjacent competitors;
- price and subscription expectations;
- proof customers appear to value;
- cultural, legal, accessibility, or support constraints;
- the intended metadata and product localization;
- measurement and rollback owners.
The brief should be reviewed by someone who understands both the language and the product category.
Research local search intent
Direct translation is one input. Discover the phrases people actually use from:
- App Store suggestions in the relevant storefront;
- names, subtitles, screenshots, and reviews of relevant local competitors;
- support tickets and interviews from that market;
- community and creator language;
- Apple Ads search terms separated by country;
- native-speaker review of category conventions and ambiguity.
Group candidates by direct solution, problem, outcome, feature, audience, and context. Note whether each phrase was translated, observed, or suggested.
Reject terms that are popular but misleading, culturally inappropriate, protected by another brand, or unsupported in the localized app.
Adapt each field as part of one promise
App name
Apple currently allows up to 30 characters. Preserve brand recognition while using category or outcome language only where it is accurate and natural. Check pronunciation, unintended meanings, truncation, and how the localized name appears after installation.
Subtitle
The subtitle also allows up to 30 characters. Add an outcome, audience, or mechanism rather than repeating the name. Read both lines together.
Keyword field
The private field allows 100 characters. Use relevant local roots that extend visible metadata. Follow Apple’s current guidance on commas, repetition, duplicate plurals, generic filler, special characters, trademarks, and relevance.
Do not promise that adding a “secondary localization” will multiply ranking coverage by a fixed amount. Apple confirms localized keywords can be used for search where the language is supported; it does not publish a universal 10x indexing rule or guaranteed result.
Promotional text and description
Promotional text does not affect search ranking, according to Apple. Use it and the description to explain the product in natural local language, including material eligibility, pricing, and current features.
Screenshots and previews
Localize the story, not just the caption layer:
- benefit order;
- interface language and realistic content;
- currency, dates, units, maps, names, and examples;
- devices and platform conventions;
- social proof that is valid in the market;
- line breaks, type size, contrast, and reading direction.
Have a native reviewer evaluate the whole sequence at actual thumbnail size. Use the screenshot guide for the message and production workflow.
Handle custom product pages and events
Custom product pages and In-App Events are localizable. Their audience, keywords, creative, deep link, timing, and eligibility may need market-specific decisions.
For a custom page:
- assign only keywords that match that page’s intent;
- keep each page’s assigned keyword set unique;
- localize the screenshots, preview, promotional text, and deep-linked experience;
- measure the page by territory and downstream value.
For an event:
- localize dates, timezone context, eligibility, and creative;
- confirm the event is available in the nominated region;
- test late, offline, ineligible, and expired paths.
Use a native review that includes context
Do not send isolated strings without the page or app state.
Give the reviewer:
- product and audience brief;
- screenshots of each placement;
- character and layout limits;
- approved terminology and claims;
- terms rejected during research and why;
- access to the localized app flow;
- a way to flag product, legal, or cultural concerns.
Preserve a back-translation and reviewer notes. Future teams should know why a phrase was chosen instead of replacing it with a literal translation six months later.
Run localization QA before release
Metadata
- Verify name, subtitle, keyword field, description, and promotional text in App Store Connect.
- Check the correct language/locale and the intended fallback.
- Remove repeated roots, competitor names, and unsupported promises.
- Confirm current field limits and editable statuses.
Creative
- Inspect every device size and orientation supplied.
- Check cropped, first, and search-result frames.
- Verify localized UI, captions, dates, currency, and units.
- Confirm app previews and poster frames.
Product
- Test clean install, onboarding, permissions, account creation, and first value.
- Verify paywall, trial, purchase, cancellation, recovery, help, and support.
- Check Dynamic Type, VoiceOver, contrast, and bidirectional layout where relevant.
- Test notifications, email, and deep links.
Operations
- Confirm support ownership and escalation.
- Record release and rollback steps.
- Capture the baseline before submission.
Roll out in measurable groups
Record the old and new state, target storefronts, version, screenshots, paid campaigns, product releases, and hypothesis.
Use three layers:
| Layer | Signals |
|---|---|
| Discovery | impressions, product-page views, relevant rank observations, source mix |
| Conversion | downloads and App Store conversion rate |
| User quality | onboarding, activation, retention, trial, purchase, refunds, support, reviews |
Inspect territory and language context without claiming more attribution precision than the data supports. Privacy thresholds, small samples, device language, fallback behavior, paid campaigns, featuring, seasonality, and product changes can affect the same result.
Example hypothesis:
A German-market page built around receipt scanning will increase qualified product-page conversion without reducing first-export completion among German users.
Do not declare victory because impressions rose. The new localization may be visible to more people while attracting the wrong job.
Maintain the localization after launch
Localization creates an ongoing surface. Assign owners for:
- product and metadata releases;
- screenshot and preview updates;
- new features and terminology;
- review and support themes;
- App Store policy and field changes;
- pricing and regional availability;
- custom pages, events, purchases, and deep links.
Review fallback and asset derivation after adding new devices or changing the primary language. Apple has specific approval and screenshot requirements for changing the primary language, including custom product page assets.
Common mistakes
Translating the US keyword list
The words are local, but the intent and competition are not. Research the market.
Localizing metadata before the app
The download converts, then the first session fails the promise. Delay or narrow the launch.
Treating one language as one market
Language can span storefronts with different spelling, intent, pricing, and product maturity.
Adding every possible localization
Unmaintained pages become inconsistent and hard to measure. Start where evidence and operations are strongest.
Crediting all growth to one translation
Record paid acquisition, featuring, product releases, ratings, seasonality, and source mix.
Final localization checklist
- The market is chosen from product and commercial evidence.
- Display and fallback behavior are documented.
- Search intent is researched locally, not only translated.
- Name, subtitle, keywords, screenshots, and app experience tell one story.
- A native reviewer sees the full page and product flow.
- Pricing, support, legal, accessibility, and customer communication are ready.
- Custom pages and events are localized with their destinations.
- The old state, hypothesis, release date, metrics, and confounders are saved.
- Acquisition is judged with activation and quality guardrails.
- No fixed keyword multiplication, rank, download, or revenue result is promised.