This SponsorBlock wiki page lists third-party ports of the browser extension for other platforms and explains how to report issues.
Open source
10 alternativesLocale Switcher
The Locale Switcher extension for Chrome and Firefox changes browser language settings and Accept-Language headers, with per-tab controls.
About Locale Switcher
Locale Switcher is a browser extension for Chrome and Firefox that changes the browser locale. When a locale is selected, it adjusts navigator.language, navigator.languages, and Accept-Language headers.
It supports 700+ languages and variations, applies settings on a per-tab basis, and includes favorited locales, a keyboard shortcut, and dark mode. It requires permission to intercept and alter web traffic and to access tabs to change navigator properties.
Key features
- Adjusts navigator.language and navigator.languages in the browser
- Modifies Accept-Language headers sent with web requests
- Supports 700+ languages and variations
- Applies locale changes on a per-tab basis
- Lets users favorite frequently used locales
- Opens with Ctrl+Shift+L on Windows, Cmd+Shift+L on Mac
Best for: People testing or viewing websites in different browser locales.
Good for
- Open source and distributed under the MIT License
- Supports 700+ languages and variations
- Works in Chrome and Firefox with per-tab settings
Watch out for
- Requires permission to intercept and alter web traffic
- Requires tab access to load script that changes navigator properties
Locale Switcher at a glance
- Category
- Privacy & Security › Ad & Tracker Blockers
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Locale Switcher FAQ
What changes when I choose a locale?
The extension adjusts navigator.language, navigator.languages, and Accept-Language headers.
Why does the extension request traffic and tab permissions?
Traffic interception is used for the Accept-Language feature, and tab access is used to load the script that changes navigator properties.
What keyboard shortcut opens the extension?
Ctrl+Shift+L on Windows and Cmd+Shift+L on Mac.
Is something wrong or out of date?
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