Facing the alternative: Germany VS Prague (CR)

Hi all,
I've been offered to get a working visa etc in the near future for living and working in one of the places: Prague (Czech Republic), or South Germany.
I've been in both places, they both have their differences, pros and cons, so it's really hard to choose.
I'd rather not to choose now, but the problem is that both of these countries have their own language and from my experience it can be hard to feel well in the country when you don't speak the local language. Thus the good thing would be to start learning on of them so when the time comes I could already communicate with locals.
The question is a bit subjective, but still: would you change Germany for the Prague or not, and why?
Thanks a lot in advance, guys.

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