Language of the spellchecker

[SylvestreMassalaz]

Is your feature request related to a problem? Please describe.
Right now, the spellcheck seems to consider that the text is only in english.

Describe the solution you'd like
An option to set the language of the text, at least at project level, and having the spellcheck work in the available languges in the app.

Describe alternatives you've considered
N/A

Additional context
Add any other context or screenshots about the feature request here.

[cgueret]

Yes, sorry about that and thanks for flagging the issue! It's indeed assuming English for everything. Now that the app is localised this should be fixed too.