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Documentation Index

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Overview

App Store localization is the strategic process of adapting your app’s store presence for international markets. This goes beyond simple translation — it requires keyword research, cultural adaptation, and market-specific optimization.

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When to Use This Skill

Use localization when you need to:
  • Expand your app to new countries and markets
  • Translate your App Store listing
  • Decide which international markets to target
  • Localize metadata and screenshots
  • Understand international ASO strategy
For keyword research in specific markets, see Keyword Research. For metadata writing, see Metadata Optimization.

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Market Prioritization

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Tier 1 Markets (Highest ROI)

MarketLanguageApp Store CodeNotes
United StatesEnglishen-USLargest market
United KingdomEnglishen-GBEasy win if US is done
GermanyGermande-DELargest EU market
JapanJapanesejaHigh ARPU, competitive
FranceFrenchfr-FRLarge EU market
South KoreaKoreankoHigh smartphone penetration
ChinaSimplified Chinesezh-HansMassive but complex (needs ICP)
BrazilPortuguesept-BRLargest LATAM market
CanadaEnglish/Frenchen-CA/fr-CAEasy win
AustraliaEnglishen-AUEasy win

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Tier 2 Markets (Good Potential)

Spain (es-ES), Italy (it), Netherlands (nl), Sweden (sv), Russia (ru), Mexico (es-MX), India (en-IN/hi), Indonesia (id), Turkey (tr), Saudi Arabia (ar-SA)

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Market Selection Framework

FactorWeightHow to assess
Market size30%iPhone user base in country
Competition25%How many localized competitors?
Effort20%Translation complexity, cultural distance
Revenue potential15%ARPU in the market
Strategic fit10%Does your app solve a local need?

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Localization Checklist

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Metadata Localization

For each target market:

Title

30 chars — Localized with market-specific keywords

Subtitle

30 chars — Localized with local keywords

Keywords

100 chars — Completely new research per market

Description

4000 chars — Translated and culturally adapted

Promotional Text

170 chars — Localized for local events/seasons

Screenshots

Text overlays translated, culturally appropriate imagery

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Critical: Keywords Are NOT Translations

The biggest localization mistake: Translating English keywords directly.
Instead:
  1. Run keyword research for each target market separately
  2. Understand how locals search (different terms, different intent)
  3. Use local autocomplete suggestions
  4. Check what local competitors use in their metadata

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Example: Budget Tracker App

budget tracker

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Cultural Adaptation

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Elements to Check

ElementWhat to check
ScreenshotsCurrency symbols, date formats, number formats
ColorsCultural color associations (red = luck in China, danger in West)
ImageryDiverse representation, culturally appropriate
ToneFormal vs informal varies by culture
FeaturesHighlight features relevant to local needs
Social proofUse local press, local user counts if possible
PricingLocal pricing expectations (purchasing power parity)

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Localization Workflow

1

Research (per market)

  1. Analyze top 10 apps in your category in the target market
  2. Run keyword research with local seed terms
  3. Identify local competitors and their positioning
  4. Understand local App Store trends
2

Translation & Adaptation

For metadata (title, subtitle, keywords):
  • Use native speakers with ASO knowledge (not just translators)
  • Provide context: “This is an App Store title, must include [keyword]”
  • Review with keyword data — does the translation include high-volume terms?
For description:
  • Professional translation with cultural adaptation
  • Not word-for-word — adapt examples, references, humor
  • Maintain the same persuasive structure
For screenshots:
  • Translate text overlays
  • Adjust UI language if app is localized
  • Consider local design preferences
3

Launch & Monitor

  1. Submit localized metadata
  2. Monitor keyword rankings in each market (weekly)
  3. Track conversion rate by country
  4. Iterate based on performance data

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Output Format

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Localization Plan

For each recommended market: 
## [Country] — [Language]

Priority: [High/Medium/Low]
Estimated effort: [hours/days]
Expected impact: [download increase estimate]

Keywords (top 10):
| Keyword | Volume | Difficulty | English equivalent |
|---------|--------|------------|-------------------|

Metadata:
- Title: [localized title] ([X]/30 chars)
- Subtitle: [localized subtitle] ([X]/30 chars)
- Keywords: [localized keyword field] ([X]/100 chars)

Cultural notes:
- [specific adaptations needed]

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Market Prioritization Matrix

MarketSizeCompetitionEffortRevenueScorePriority
Germany96787.5High
Japan108497.8High
Brazil85666.4Medium

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Example Output

## Germany — German (de-DE)

Priority: High
Estimated effort: 16 hours
Expected impact: +20% downloads (largest EU market)

Keywords (top 10):
| Keyword | Volume | Difficulty | English equivalent |
|---------|--------|------------|-----------------|
| meditation app | 8,200 | 72 | meditation app |
| entspannung | 6,500 | 58 | relaxation |
| achtsamkeit | 5,900 | 65 | mindfulness |
| schlaf app | 4,100 | 70 | sleep app |
| stressabbau | 3,200 | 55 | stress relief |

Metadata:
- Title: Calm — Meditation & Schlaf (29/30 chars)
- Subtitle: Entspannung für jeden Tag (27/30 chars)
- Keywords: achtsamkeit,entspannung,yoga,stressabbau,angst,schlaf,einschlafen,musik,entspannungsmusik (98/100)

Cultural notes:
- Germans value privacy — emphasize offline mode
- Formal tone preferred ("Sie" not "du")
- Include TÜV or Stiftung Warentest mentions if available
- Highlight scientific backing (Germans trust data)

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