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How Do I Add a Custom Language in Firefox?

Fresh5 days ago
Mar 15, 20261794 views
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Problem

Firefox has a list of built-in languages that are used to set the HTTP_ACCEPT_LANGUAGE header. How do I add a custom one that's not on the list?

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Fix for: How Do I Add a Custom Language in Firefox?

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Is this what you're looking for? It's from a similar post. EDIT: As far as I can tell, this GUI option just changes the preference "intl.accept_languages" in about:config. You could edit this yourself to change it to a custom value. I'm not sure if …

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