I wouldn't be too sure of that. Each language's ecosystem fosters certain ways of approaching and solving problems.

For example, Erlang/OTP brings a lot to the table. Being functional, it would protect you against certain types of errors leaving you free to solve more complex problems. You pay for it with run time performance. String operations are slow etc.

C++ is very fast and very sharp. Not easy to get everything right. (Some sort Greenspun's rule would apply here I think. Substitute Erlang for Common Lisp).