@malkavian: But the problem is that everyone uses different languages even on English adapted keyboards. For example, I use Dutch, English and German as my 3 main languages. So I should ask for a English variant that has German on it as well (considering that German is more used than Dutch throughout the world)?

You can't please everyone, so my opinion is that it's best to now focus on what can be done for an initial batch to please the most people. There are very Spanish speaking Jolla users atm so English, German and French are IMHO more important since Jolla is available in more countries where those languages are spoken (or close variants thereof).