axiom-localization
Localization & Internationalization
Comprehensive guide to app localization using String Catalogs. Apple Design Award Inclusivity winners always support multiple languages with excellent RTL (Right-to-Left) support.
Overview
String Catalogs (.xcstrings) are Xcode 15's unified format for managing app localization. They replace legacy .strings and .stringsdict files with a single JSON-based format that's easier to maintain, diff, and integrate with translation workflows.
This skill covers String Catalogs, SwiftUI/UIKit localization APIs, plural handling, RTL support, locale-aware formatting, and migration strategies from legacy formats.
When to Use This Skill
- Setting up String Catalogs in Xcode 15+
- Localizing SwiftUI and UIKit apps
- Handling plural forms correctly (critical for many languages)
- Supporting RTL languages (Arabic, Hebrew)
- Formatting dates, numbers, and currencies by locale
- Migrating from legacy
.strings/.stringsdictfiles - Preparing App Shortcuts and App Intents for localization
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