Language Detection
Detect your browser's preferred language settings.
Your browser language is the locale preference configured in your browser or operating system settings. Websites use this to serve content in your preferred language. You can change it in your browser's language settings.
Your browser sends a list of preferred languages to websites in order of preference. Websites that support multiple languages use this to automatically display content in your preferred language.
If a site doesn't have content in your first choice, it will try the next language in your list. This is why configuring multiple languages can be helpful for multilingual users.
Need to verify which language preferences your browser sends to websites? This free tool reveals your primary setting and complete preference list—essential for troubleshooting localization issues, verifying configuration after updates, or understanding how multilingual sites select content.
When visiting multilingual websites, servers check your preferences to automatically display matching content. This mechanism enables services like search engines, encyclopedias, and social platforms to present interfaces and results in your preferred language without manual selection.
Preferences follow BCP 47 codes combining language with optional region: "en-US" (English, United States), "en-GB" (English, United Kingdom), "es-MX" (Spanish, Mexico). Region codes help sites deliver localized spelling, date formats, currency symbols, and cultural conventions appropriate to your location.
Multiple preferences can be configured in priority order. If content isn't available in your first choice, sites attempt the next option. This fallback behavior benefits multilingual users comfortable reading content across several languages when primary translations aren't available.
Common verification scenarios: websites displaying unexpected languages, confirming settings after browser updates or new device setup, understanding why certain content appears differently than expected, and providing accurate configuration details to technical support teams.
Reads the Accept-Language header sent with every request—the same data websites receive when you connect. Works across all devices and browsers. To modify preferences, access browser settings and locate Language options. Bookmark for quick verification whenever localization questions arise. No files or personal data are accessed during detection.
Browser language is the preferred language setting in your web browser. Websites use this to automatically show content in your preferred language when translations are available.
In most browsers, go to Settings > Languages or Preferences. You can add, remove, and reorder languages. The first language in your list is sent as your primary preference to websites.
Language codes follow the BCP 47 standard. The first part (en) is the language, and the optional second part (US) is the region or country. So 'en-US' means English as used in the United States, while 'en-GB' means British English.