I would like to say Chinese mandarin because I already know spanish.

GoO DLuck!!

Spanish since it is the second most popular language in the US, but if you want to travel to Asia or work in business, Chinese

You could always learn both

If you have to live in America all your life, the better choice is Spanish, though Chinese is the more spoken language worldwide. But you have to decide according to the place you live in. So the obvious choice is Spanish. That’s my suggestion. Hope it helps.

Spanish, unless you’re planning on moving to China. Actually Chinese is the third most widely spoken language in the US. If it interests you then by all means do it, but Mandarin is very difficult, it’s tonal, and they don’t use the roman alphabet. It can be very difficult to overcome these things. Spanish would be much easier to learn.