Undocumented syntax highlighting languages

Question

I've just discovered that AMPscript (a scripting language for Salesforce Marketing Cloud) supports syntax highlighting in SFSE using the language tag lang-ampscript after the code fence (```). Where did that come from?! I've always used javascript syntax highlighting before. Here's one of my AMPscript answers with code highlighting.

Oh, wait, there's one for Apex too! (lang-apex).

Integer x, sign;
// Your code
if (x <= 0) {
    if (x == 0) {
           sign = 0; 
    } else  {
           sign = -1;
    }
}

Is there a complete list of undocumented syntax highlighting for other languages (SOQL, Visualforce, etc)?