Adding a language hint to a tag for syntax highlighting

I am a moderator over at Economics.SE, where some users have requested that syntax highlighting be implemented for questions that use the r, Matlab, or python programming languages and font style from font Bee Website As I understand (from Changes to syntax highlighting and What is syntax highlighting and how does it work?), this requires that a language hint be added to the tags on our site corresponding to these languages.

Could someone explain how I can add the language hint to these tags?
Fonts Bee