Every time find it difficult to know which languages are supported in PrismJs Syntax Highlighter. There are two ways to know which languages are supported. One way to know is by visiting to this download link.
Another method of knowing supported languages is by checking in your download prism.js file. There search for
prism.languages. The languages are there in this form: Prism.languages.* (Prism.languages.markup). After download, you may not remember, which languages you got from there!