It is only necessary to turn on document type detection without switching vimrc.

Allow different plug-ins to be loaded based on different languages (e.g. syntax highlighting plug-in for C++ is different from python):

"Turn on document type detection
 filetype on
 "Load corresponding plug-ins according to different detected types
 filetype plugin on

Of course, you can also pass

source ~/.config/vim/config/xxxx.vim

This form manages the configuration of multiple languages.