Replit now supports every programming language in Nix
No, you don't. Fortran is still an important language in scientific computing, and you don't support it. The gfortran compiler is part of gcc, so I think you should be able to. I also don't see Cobol, Ada, and Pascal. If you don't think these languages are worth supporting, so be it, but asserting that they don't exist may irk people using those languages.