I guess esolangs, espteric programming languages, are my thing. Or one of my things.
I was particularly delighted by this line about a particular esolang called Whitespace from this article:
Whitespace (2003) uses only tab, space, and return. In Whitespace, commands are multicoded as what is normally read as their absence. These characters are treated interchangeably by C and C-derived languages, meaning Whitespace programs can be embedded between words in these programs, creating polyglot programs that function in both languages.