esl wouldWhat would be the best languages to learn for ESL teacher?

I already speak fluent Spanish, in my college the major requires me to learn 3 languages. Which should three would be the better choices? Should I do Spanish, even though I already speak it? This are also languages such as: Russian, Greek, French, Latin, Hebrew, and German. Someone help! I need to change my classes now while I still haesl wouldve time. I wish to teach ESL in an elementary school.

Thanks in advance to all those who respond.
Depends on where you live. Here in central Iowa, we have a large Bosnian immigrant population so a majority of all our foreign students are Bosnian. I would advise you to make an educated decision based on common ethnic groups in placesl wouldes where you'd like to work.

Spanish is a dead give away, I think you should choose it even though you already speak it fluently, the practice is always good. Unless you don't feel like you need the practice, then choose something like German, Chinese, Russian and any other ethnic groups that are commonly in your area.