Incorrect value of navigator.language property in the editor and fullscreen mode

Nature of issue?

• Found a bug

Details about the bug:

I'm using the Chrome browser on a Chromebook Version 88.0.4324.186 (Official Build) (64-bit)

I wanted to test an api call that passed my browser's language and test it with other languages. I'm getting the language code from the navigator.language property. The default value of navigator.language is "en-GB". I installed a Chrome Locale Switcher extension to change this value. Whenever I switch locales I reload the sketch. When I tested my code I noticed that whatever language I changed the locale to, for example "fr", "en-GB" was always being passed to the api. I console logged the value in the p5 console and it showed "en-GB". However, if I open the Chrome dev tools and display the value of navigator.language it is shown as "fr". When I run the sketch in "present" mode, via the share option, the value of navigator.language is correctly returned as "fr". The incorrect value is also returned in "full" mode.

A simple snippet of code would be
console.log(navigator.language);

Reproduce the issue in the editor using console.log(navigator.language) with Chrome's locale changed, then compare the value in the editor, full mode, and present mode. Trace the editor and fullscreen entry points involved in running sketches; done means the reported locale matches the browser locale in editor and full mode as it already does in present mode.