I have a contact with a French Canadian company : they tell me it's not needed. Same for French Belgium and French Switzerland.

Well, if we have the language available, we should also list it.

Well, if we have the language available, we should also list it.

No !!!
1 translation only ! If it's not needed : do not give work to translator !
https://translate.limesurvey.org/projects/limesurvey-6/fr-ca/default/?filters%5Bstatus%5D=current

If we can not have something like this :

• String came FR-ca translation if translation exist
• Else string came from FR translation if exist
• Else code

@DenisChenu, I agree to that this would be a nice solution.
And as long as there is just 1 (!) string translated for French (Canadian) I think we can easily remove the language.

What was the explanation of your customers for stating that this language is not actually needed? Is the default "French" sufficient?

Is the default "French" sufficient?

According to my client some year ago : yes.

If your client need the translation : they know the string to update.

@DenisChenu, it turns out that this is not really related to error messages or button labels which are usually taken from the translation files. My customer (big, global company) told me that they especially need to be able to have different question texts for French and French Canadian because terms are different at these languages and they receive specific, different question texts for that language.

So after that feedback my conclusion is that we should add that language to the available languages!
I will also ask them if they can contribute by finishing the translation (actually I think 95% of the texts can be taken from the French translation).