In my younger days I was a language maven, but you need to keep up with these things to stay proficient and I have not done so.
Other than my native English I used to be quite the wiz at COBOL-74, Fortran-4 and 360- and 370-Assembler. I got into PL-1 for a while then a lot of C and the various x86 assemblers. Trailed off after that and lost most of my syntax skills since. I can still converse in a mean Visual Basic, though.