Prefered Language

I am currently coding in Python for competitve programming but I did read that Python is relatively slower than other languages. What language should I learn that is the most suitable for USACO, AIO, Codeforces, etc?

Thanks in advance!

C++ is recommended because on OJ’s like CSES and, some problems can only pass in C++, and would time out in Java or Python. See here for more info.