Have individual language settings (spell-checker) for each bubble

We're an international company, so it's great to have the spell-checker available for different languages. Unfortunately there is only one global setting for the spell-checker. So when switching from a German speaking bubble to an international one, I have to change the spell-checker to English. And when switching back to the German speaking bubble, I have to switch the spell-checker back to German.

So it would be great if each bubble could have an individual spelling checker setting on its own.