Notifications beeing sent out in the languge a single user selects and not based on the users preference

Hey guys how's it going?

So for 2017 i've got to make my clients site support more multi languages , and one problem that i've been facing over the past year or so is this:

Lets say some one wants to view the site in french and adds an update on the network as i've installed the french languge pack on the site it sends the notifications out in french to everyone, but thats not really logical, just because the user is viewing the site in french doesn't mean that the rest of the users shouldn't see french notificaiton (i'm talking about all the component text friend request etc not the user genereated content) make sence?

Is it I whom is doing some thing wrong or am i missing some thing? is there a way i can get the languge to be set per profile ie if some one selects English during sign up he only gets notifications from the english pack, and same if some one sets it as French he gets french notifiaitons.

best