Languages learned before 20: a little Fortran IV.

Languages learned between 30 and 40: Assembler, Pascal, C, C++, Perl, PL/SQL, T-SQL.

Languages learned between 40 and 50: Python

Languages learned since 50: PHP. (OK, I'm slowing down...)

Am I an expert in all of the above? No. Have I done very useful things with some of them? Yes.