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localization-testing Internationalization (i18n) and localization (l10n) testing for global products including translations, locale formats, RTL languages, and cultural appropriateness. Use when launching in new markets or building multi-language products.
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GitHub 저장소 열기 name localization-testing description Internationalization (i18n) and localization (l10n) testing for global products including translations, locale formats, RTL languages, and cultural appropriateness. Use when launching in new markets or building multi-language products. category specialized-testing priority medium tokenEstimate 800 agents ["qe-test-generator","qe-test-executor","qe-visual-tester"] implementation_status optimized optimization_version 1 last_optimized 2025-12-02T00:00:00.000Z dependencies [] quick_reference_card true tags ["localization","i18n","l10n","translation","rtl","unicode","locale"]
Localization & Internationalization Testing
<default_to_action>
When testing multi-language/region support:
VERIFY translation coverage (all strings translated)
TEST locale-specific formats (date, time, currency, numbers)
VALIDATE RTL layout (Arabic, Hebrew)
CHECK character encoding (UTF-8, unicode)
CONFIRM cultural appropriateness (icons, colors, content)
Quick i18n Checklist:
All user-facing strings externalized
No hardcoded text in code
Date/time/currency formatted per locale
RTL languages flip layout correctly
Unicode characters display properly
Critical Success Factors:
Don't hardcode strings - externalize everything
Test with real speakers, not just translation files
RTL requires mirrored UI layout
</default_to_action>
Quick Reference Card
When to Use
Launching in new markets
Adding language support
Before international releases
After UI changes
i18n vs l10n
Term Full Name Focus i18n Internationalization Building for localization l10n Localization Adapting for specific locale
Common Locale Formats
Type US (en-US) UK (en-GB) Japan (ja-JP) Date 10/24/2025 24/10/2025 2025/10/24 Currency $1,234.56 £1,234.56 ¥1,235 Number 1,234.56 1,234.56 1,234.56
Translation Coverage Testing
test ('all strings are translated' , () => {
const enKeys = Object .keys (translations.en
const
Object
keys
fr
const
Object
keys
es
expect
toEqual
expect
toEqual
test
'no missing translation placeholders'
async
await
goto
'/?lang=fr'
const
await
textContent
'body'
expect
not
toContain
'translation.missing'
expect
not
toMatch
/\{\{.*\}\}/
Date/Time/Currency Formats test ('date formats by locale' , () => {
const date = new Date ('2025-10-24' );
expect (formatDate (date, 'en-US' )).toBe ('10/24/2025' );
expect (formatDate (date, 'en-GB' )).toBe ('24/10/2025' );
expect (formatDate (date, 'ja-JP' )).toBe ('2025/10/24' );
});
test ('currency formats by locale' , () => {
const amount = 1234.56 ;
expect (formatCurrency (amount, 'en-US' , 'USD' )).toBe ('$1,234.56' );
expect (formatCurrency (amount, 'de-DE' , 'EUR' )).toBe ('1.234,56 €' );
expect (formatCurrency (amount, 'ja-JP' , 'JPY' )).toBe ('¥1,235' );
});
RTL (Right-to-Left) Testing test ('layout flips for RTL languages' , async ({ page }) => {
await page.goto ('/?lang=ar' );
const dir = await page.locator ('html' ).getAttribute ('dir' );
expect (dir).toBe ('rtl' );
const nav = await page.locator ('nav' );
const styles = await nav.evaluate (el =>window .getComputedStyle (el)
);
expect (styles.direction ).toBe ('rtl' );
});
test ('icons/images appropriate for RTL' , async ({ page }) => {
await page.goto ('/?lang=he' );
const backIcon = await page.locator ('.back-icon' );
expect (await backIcon.getAttribute ('class' )).toContain ('rtl-flipped' );
});
Unicode Character Support test ('supports unicode characters' , async ({ page }) => {
await page.fill ('#name' , '山田太郎' );
await page.click ('#submit' );
const saved = await db.users .findOne ({ });
expect (saved.name ).toBe ('山田太郎' );
await page.fill ('#name' , 'محمد' );
await page.fill ('#bio' , '👋🌍' );
expect (saved.bio ).toBe ('👋🌍' );
});
Agent-Driven Localization Testing
await Task ("Localization Testing" , {
url : 'https://example.com' ,
locales : ['en-US' , 'fr-FR' , 'de-DE' , 'ja-JP' , 'ar-SA' ],
checks : ['translations' , 'formats' , 'rtl' , 'unicode' ],
detectHardcodedStrings : true
}, "qe-test-generator" );
Agent Coordination Hints
Memory Namespace aqe/localization-testing/
├── translations/* - Translation coverage
├── formats/* - Locale-specific formats
├── rtl-validation/* - RTL layout checks
└── unicode/* - Character encoding tests
Fleet Coordination const l10nFleet = await FleetManager .coordinate ({
strategy : 'localization-testing' ,
agents : [
'qe-test-generator' ,
'qe-test-executor' ,
'qe-visual-tester'
],
topology : 'parallel'
});
Related Skills
Remember Don't hardcode. Externalize all user-facing strings. Every string visible to users must come from translation files, not code.
Test with native speakers, not just translation files. Machine translations and translation files can have context issues that only native speakers catch.
With Agents: Agents validate translation coverage, detect hardcoded strings, test locale-specific formatting, and verify RTL layouts automatically across all supported languages.
