It's a normal fee, and it should be the tuition of your own major that is only included in the tuition. If you learn a second foreign language, you will have to get credit for it. But not too much. That is, the academic performance multiplied by the unit price of credits is the fee to be paid.

It can also be said that learning a second foreign language is equivalent to getting a second degree. There must be a charge, but there are many benefits.