Missing the internationalization information

[ernestob]

Switching the language works, but is not mocking all the internationalization settings.

How to reproduce the issue?
Load https://browserleaks.com/javascript
Scroll down to the "Internationalization API" section

The internationalization API is still having the locale in the language of your OS.

[cas--]

Can also confirm in the console after switching to af in locale-switcher:

navigator.language
"af"
Intl.Collator().resolvedOptions().locale 
"en-GB"

However I found that the web app I was testing was caching the original language and not updating when switching language therefore this issue doesn't actually affect my use-case...