I'm an old person, using personal computers for about 30 years.
I used BASIC, DOS, and UNIX series.
I have used many programming languages, but I use only the following languages recently:

• C
• x86
• bash
• Perl
• Java
• Ruby
• Javascript
• Emacs Lisp

However, almost excluding C are not perfect.

Other languages, which I have used but I can't use now, are:

C++, fortran, casle, 68k, Z80, N80-BASIC, N88-BASIC(86)