Hi again, @CollegeBargain! A lot of Revelle students are CS majors and although you’ve probably already fulfilled the foreign language requirement, many haven’t. Therefore, I can say that it is very feasible to study a language in addition to your major. You can this study out as much as you like, but UCSD has a solid linguistics program with loads of opportunities.
HUM is hard and lengthy, yeah, but it shouldn’t preclude being able to study what you want. A minor might be more difficult, but if you have enough AP credits to eliminate many Revelle GEs you should be good