App Store localization is the adaptation of an app’s product page for a specific language and market: metadata, search vocabulary, messaging, and visual assets. The goal is a page that speaks to how people in that market actually describe the problem your app solves. It is not the same as running your description through a translator.
Translation moves words between languages. Localization decides what the page should say in the first place: which features lead, which proof points matter, and which words local users type into search. The same product often needs a different argument in Tokyo than in Berlin, and that difference is a growth decision, not a text-export task.
This guide covers the App Store product page specifically — what can be localized, how to pick markets, a six-step workflow, cross-localization, and the mistakes that cost the most. In-app localization is a separate project, noted here where the two intersect.
What Is App Store Localization?
In practice, App Store localization is a set of decisions you make per locale and then publish: which audience the page is for, what it promises them, and which words it uses to say so. The publishing happens in App Store Connect, where you add a language to your app record and supply localized metadata against it (Apple, Localize app information). Adding the language is the easy half. Deciding what belongs in those fields is the work.
The scope is wider than most teams budget for. The W3C Internationalization Activity defines localization as adapting a product to meet the language, cultural, and other requirements of a specific target market, and notes that it can extend to graphics and references that a given culture may read differently (W3C, Localization vs. Internationalization). On a store page that means the screenshots as much as the copy.
The distinction that causes the most confusion is between store localization and in-app localization. Store localization changes what a potential user sees before installing: the name, subtitle, description, keywords, screenshots, and previews on the product page. In-app localization changes what they experience after installing: interface strings, date and currency formatting, support content, and onboarding.
The two are separate projects with separate owners, and a mismatch between them is expensive. A localized product page leading to an English-only app produces installs that churn immediately, which raises acquisition cost without adding revenue. Localize the page for markets your product can actually serve.
Worth naming early: localization is not a one-time delivery. Competitors update their listings, local search vocabulary shifts, and your own product changes. A locale you localized two years ago and never revisited is running on assumptions nobody has checked since.
What Can You Localize in an App Store Product Page?
Apple supports metadata localization across a broad set of languages and locales. It spans Arabic, both Chinese scripts, four English variants, the major European languages, Japanese and Korean, regional Portuguese and Spanish, and eleven Indian languages (Apple, App Store localizations). It changes, so check it before planning a rollout.
Metadata and Search Language
The name and subtitle are each capped at 30 characters, the description at 4,000, and promotional text at 170. Keywords are limited to 100 bytes, with each keyword longer than two characters. Apple notes that your app is already searchable by app name and company name, so repeating those in the keyword field wastes space, and names of other apps or companies are not permitted (Apple, Platform version information).
The byte limit is the one that surprises teams. Accented and non-Latin characters consume more than one byte each, so a keyword set that fits comfortably in English may not fit in Polish or Japanese.
Screenshots and Product Messaging
Screenshots are required and can be localized, and you can add up to three app previews per localization per device size. This is where localization stops being a language exercise: caption wording, which feature appears first, and which proof point earns the opening frame are all market decisions.
Adapt screenshots when the message, the language, or the cultural context differs — not merely when the words need translating. Teams without in-house capacity often treat this as a creative production workstream rather than a translation ticket.
App Information and Storefront Context
Some properties are shared across platforms, others are version-specific, and which fields can be edited without a new submission changes over time. Promotional text can be updated without resubmitting, which makes it useful for testing local messaging quickly. Confirm current field behavior in App Store Connect documentation before planning a release schedule around it.
| Element | Purpose | Localization question | QA check |
|---|---|---|---|
| App name (30 chars) | Recognition and search relevance | Does the local audience know the brand, or does the name need a descriptor? | Length after translation; rendering in local script |
| Subtitle (30 chars) | The one-line promise | What is the single strongest benefit in this market? | Truncation on smaller devices |
| Keywords (100 bytes) | Search coverage | What do local users actually type? | Byte count, no name duplication, no competitor names |
| Description (4,000) | Depth and objection handling | Which objections are specific to this market? | Plain text only; no HTML; readable first three lines |
| Promotional text (170) | Fast, low-friction messaging | Is there a local moment worth naming? | Updatable without resubmission; still accurate |
| Screenshots | The visual argument | Does the feature order match local priorities? | Caption legibility; no untranslated interface strings |
| App previews | Motion demonstration | Does the flow shown make sense locally? | Up to three per localization per device size |
How to Choose Which App Store Locales to Prioritize
Choose markets where demand, product readiness, and operational feasibility overlap. Language volume alone is a poor selector: a large addressable audience you cannot support, bill, or retain is not an opportunity. A workable way to frame the decision:
Market priority = strategic demand × product readiness × localization feasibility
That is a way of thinking, not a formula to compute. The value of writing it down is that it forces three separate conversations instead of one argument about which country feels exciting.
| Input | What to assess | Disqualifying signal |
|---|---|---|
| Strategic demand | Category size, competitor presence, existing organic installs from the market | Interest concentrated in a segment your product does not serve |
| Paid acquisition strategy | Whether you intend to buy traffic there, and at what allowable cost | No media plan and no organic base, so nothing will drive the page |
| Product readiness | Interface language, onboarding, content availability, core feature parity | Localized page leading to an untranslated product |
| Payments and regulation | Supported payment methods, pricing tiers, category or content rules | Legal or billing blockers unresolved at launch |
| Support capacity | Reviews, help content, and support handling in the local language | No plan for responding to reviews you cannot read |
| Creative capacity | Ability to produce and maintain localized screenshots and previews | One-time asset drop with no refresh plan |
Product readiness deserves particular weight, because a localized store page raises expectations that the product then has to meet. This is the same dynamic covered in why great media buying can’t fix an unprepared product — better top-of-funnel presentation makes an unready product fail faster, not slower.
How to Localize an App Store Page: A 6-Step Workflow
1. Define the Market and User Context
Write down the locale, the target segment, the primary use case, the main competitors in that storefront, and any product constraints that apply. A meditation app entering Japan and the same app entering Brazil are not running the same project, and the differences should be explicit before anyone writes copy. Note what you cannot change too: if pricing tiers or a key integration are unavailable locally, the page has to work around that rather than pretend otherwise.
2. Research Local Search Language
Find the words local users actually use. Look at how competitors in that storefront name and describe themselves, read local reviews for the vocabulary customers reach for unprompted, and check the category conventions in that market.
Literal translation reliably misses here, because the term a category is known by is often a borrowed English word in one market and a native compound in another. Reviews are the most underused source: they show the problem in the customer’s own words, before any marketer reworded it. The person to run this is a native speaker who understands the product, not just the language.
3. Adapt Metadata Around Local Intent
Now write the metadata against what you found. Local keyword relevance drives the keyword field and informs the name and subtitle; the local value proposition drives the description. The subtitle is the sharpest test: 30 characters forces you to choose one promise, and the right promise often differs by market.
The name deserves the same scrutiny. In a market where nobody has heard of you, it may need a descriptor that a home-market audience would find redundant. Recognition and message work together, which is why localized positioning overlaps with brand awareness rather than sitting apart from it.
An example — a budgeting app expanding from the US into a European market:
| Element | Translation approach | Localization approach |
|---|---|---|
| Subtitle | The US subtitle rendered word for word into the local language | Leads with bank-connection coverage, because local users judge budgeting apps first on whether their bank is supported |
| Screenshot 1 caption | “Track spending in seconds” translated literally | Names the local banking integration explicitly, since that is the deciding question |
| Screenshot 2 caption | “Smart budgets that learn” translated literally | Replaced with a data-handling statement, because automated categorization raises privacy questions in this market |
| Keywords | Translated US keyword set | Rebuilt from local search vocabulary, with byte count checked for accented characters |
4. Localize Screenshots and Creative Hierarchy
Reorder before you rewrite. If the deciding feature in this market is third in your screenshot sequence, move it to first. Then adapt captions and swap proof points for ones that carry weight locally. Check that any interface shown inside the screenshots is in the right language too: an English app UI behind a translated caption undoes the whole exercise. Reusing US screenshots with translated captions is the most common half-measure, and it produces a page that reads as imported.
5. Run Linguistic, Product, and Storefront QA
Run three separate passes in order, because each catches a different class of error.
The storefront pass is the one teams skip. Check the live page in the target storefront on a real device, confirm the metadata landed in the intended locale, and verify that legal and compliance wording is correct for that market. Reviewing a staging preview is not the same as looking at what a local customer sees.
Who Owns Each Step
The workflow fails most often at the handoffs, not inside the steps. Naming an owner and a gate for each one is what keeps a locale from shipping with translated captions over English screenshots. The split below is a starting point to adapt to your own team structure, not a fixed org chart.
| Step | Owner | Reviewer | Gate before moving on |
|---|---|---|---|
| 1. Market context | Growth lead | Product, finance | Payments, regulation, and support capacity confirmed |
| 2. Search language | ASO manager | Native speaker with product knowledge | Local term set validated against real listings and reviews |
| 3. Metadata | ASO manager | Native reviewer, legal where claims are made | Every field within its character or byte limit |
| 4. Creative | Creative production | Growth lead, native reviewer | Feature order justified by local research, not copied |
| 5. QA | Whoever did not write the copy | — | All three layers signed off, storefront checked live |
| 6. Measurement | Analytics or growth | Growth lead | Baseline recorded before release, confounders listed |
One rule is worth enforcing regardless of structure: the person who wrote the localized copy should not be the person who signs off on it. Self-review is where fluent-but-wrong survives.
6. Measure, Learn, and Iterate
Capture a baseline before you release: impressions, product page views, conversion rate, and downstream quality signals for that locale. Release coherent changes rather than one field at a time, so you can read the result.
Then compare against that baseline, accounting for anything else that shipped in the same window. A product release, a price change, or a campaign launch will all move the same numbers.
For the paid side, use your MMP’s documented methodology rather than a spreadsheet of your own. AppsFlyer’s cohort and retention dashboard, for instance, segments users by conversion time and breaks results down by campaign or media source (AppsFlyer, Cohort and retention dashboard). That is what lets you compare a locale against itself over time. Keep a decision log so the next locale starts from evidence rather than memory.
What Is Cross-Localization on the App Store?
Cross-localization is an ASO approach that builds on how the App Store assigns languages to storefronts. Apple documents a default language for each country or region, plus additional supported languages in many of them (Apple, App Store localizations). Three examples:
- Canada — English (Canada) by default, French (Canada) also supported.
- Japan — Japanese by default, English (US) also supported.
- India — English (U.K.) by default, with eleven additional languages including Hindi, Tamil, and Bangla.
Because more than one localization can be active in a single storefront, ASO practitioners populate additional supported locales to widen keyword coverage in that market. Apple describes which language is shown to a customer: it depends on the App Store language for their location, their device language settings, the languages you have added, and your primary language. What Apple does not publish is how search indexing treats those localizations.
So treat cross-localization as a market-specific hypothesis, not a ranking shortcut. Set it up deliberately, keep every localization coherent for a real reader who might land on it, and validate the result in that storefront before repeating the approach elsewhere. Filling a secondary locale with keyword strings that no human would read is a poor bet against both App Review and your own conversion rate.
Common App Store Localization Mistakes
- Translating product terms literally. Feature names and category words often have an established local form that a translator will not guess.
- Choosing the market before the product is ready. A localized page pointing at an untranslated product converts installs into immediate churn.
- Reusing screenshots with translated captions. Feature order and proof points carry the argument, and both are market-dependent.
- Treating country and language as the same thing. One storefront can serve several languages, and one language spans many storefronts with different competitors, prices, and expectations.
- Skipping native-speaker QA. Machine output reads fluently and still lands in the wrong register — the failure mode hardest to catch internally, because nothing looks broken.
- Measuring downloads without conversion or retention context. A download increase alongside worse retention is not a localization win.
- Publishing unverified claims about ranking. Apple does not document indexing behavior. Presenting community inference as platform fact leads teams to optimize against rules that may not exist.
Underlying most of these is one mismatch: between the promise on the product page and what the product actually delivers locally. When those diverge, the acquisition cost stays the same and the user quality drops, which is why market entry belongs in the same conversation as mobile user acquisition planning rather than downstream of it.
App Store Localization Checklist
- Confirm the market decision against demand, product readiness, and operational feasibility.
- Verify the locale is currently supported in App Store Connect documentation.
- Build local keyword research from native sources, not translation.
- Write metadata to local intent; check character and byte limits per field.
- Reorder and adapt screenshots before translating captions.
- Run all three QA layers: linguistic, product and creative, storefront.
- Record a baseline before release and note anything else shipping in the same window.
- Log the hypothesis, assets, and result so the next locale starts from evidence.
A minimal decision log — one row per locale, filled in before release and completed after:
| Field | What to record |
|---|---|
| Locale and storefront | The language and the country or region it was published to |
| Hypothesis | What you expected to change, and why |
| Assets changed | Which fields and creative were altered in this release |
| Baseline | Impressions, product page views, conversion rate, and quality signals before release |
| Confounders | Other releases, price changes, or campaigns live in the same window |
| Result and decision | What the data showed and what you decided to do next |
Conclusion: Localization Is Market Entry, Not Text Export
A localized product page is a claim about how well you understand a market. Treat each locale as an iterative entry: decide deliberately, adapt rather than translate, run all three QA layers, and measure against a baseline you recorded in advance.
Localization does not guarantee more downloads, and any guide that promises it is selling something. What it does is give the right users a page that speaks their language about their problem. Teams scaling across geographies can see how we approach market expansion and acquisition quality at ROCKAPP.
