Hi, I want to teach Arabic for Turkish speakers and create a classroom but I could not see it in language options.
Best regards, Yunus Alpfidan
Duolingo doesn't yet have a course teaching Arabic for Turkish speakers. The only course that teaches Arabic is for English speakers, and it's going to be another few months before that course is finished.
You can see a list of Duolingo's courses, including those still being built, here: https://incubator.duolingo.com/