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LocaleX is a native macOS application designed to simplify the process of localizing iOS and macOS applications. It connects directly to your Xcode projects, reading and writing to standard .xcstrings and .strings files. The core function is to automate the translation of your app's text into over 130 languages. Instead of manually copying strings to external services, you manage the entire workflow within a single, dedicated interface built for developers.

LocaleX works by using your own API keys for major AI models like OpenAI's ChatGPT, Anthropic's Claude, or Google's Gemini. This means you control the AI service and costs, and your data remains private. The tool provides context to the AI about your app to improve translation accuracy. It also includes a translation memory that stores your past translations, suggesting them for similar strings to ensure consistency. A custom glossary feature lets you define brand-specific terms that should not be translated or should always be translated in a specific way.

This tool is most beneficial for individual developers and teams building apps for a global audience. It turns a process that can take hours of manual work into a task that can be completed in minutes. A typical use case is a developer preparing to launch an app update; they can use LocaleX to quickly generate translations for all new text, review the suggestions, and sync the changes directly back to their Xcode project, significantly speeding up the release cycle for international markets.