Ozwillo invitation emails should be in recipients languages

[vdachev]

The organization invitation emails I received yesterday were in French, because they were sent from @mdutoo . However, I am not very fluent in French and I have set my preference to English. Moreover, @mdutoo knows I would be very happy to get my invitations in English, Bulgarian, Russian, etc..

I suggest two things here:

1. Allow the sender to choose a language for the invitation;
2. If the recipient email address is associated with an Ozwillo account, take the language preference from the account and use it instead.

[tbroyer]

Just a note to explain the rationale behind the current behavior: it's expected that most of the time people inviting each others will speak the same language; it also matches what most other websites/platforms seem to be doing.

Of course “most of the time” is not “every time”.

(BTW, that issue should have been filled at ozwillo/ozwillo-issues, as it happens that the mails are actually sent by the Kernel, not the Portal)