What programming languages always learned in computer science B.Sc.?
There is no programming language that is taught in every computer science B.A. program. There is a lot of variation in what languages are used to teach material, in different programs.  For instance, when I took computer science classes, I learned only C and Standard ML.  There are other other programs where you might learn (for example) Python and Java.  If you choose any one programming language, I would imagine you can find some B.A. programs that teach that language and others that don't.

Learning a specific programming language is usually not the main point of a computer science education. The goal is to learn concepts and skills, and teaching any one programming language is just a way to support that goal.