Force language for "recaptcha" (registration form)

The question:

I have created personal captcha codes as described here:

This works so far.

My Windows and Google account are configured in German.

When I go to the english (!) website and fill out in the registration form, the “Captcha” (still V2 with the picture puzzles) appears with german description.
This is of course difficult to solve for visitors of other countries/languages.

Is this adopted to default browser-language (would be OK - great…) or stays hard-locked to the language of my google account?

In other cases I must try to solve it like this to force english description:

In this case do I have to set
$original === 'en'

Thanks for any help!