Since I am currently looking for translation jobs in Dubai, What are the most important languages I should learn?

French,Spapnish,Norweigan,Danish,Polish,German.Most of these nationals live in the U.A.E after Arabs Americans and British

English, German, Russian, Chinese!

Well, In My Opinion Spanish and Japanese are one of those languages which provide you a good scope in Future. There are Several reasons behind that like:-With some 400 million speakers, Spanish is the fourth most commonly spoken language in the world. If you count only native speakers, Spanish outranks English. Spanish is an official language on four continents and is the mother tongue in 21 countries.

I think you should look for statistical information about the different nationalities that live or at least travel frequently there. I mean the most spoken language/s among them, then you can decide

Since the question has relation with Dubai, which I do not have information about jobs in it, I can not provide an answer for the question.