I have created an esoteric programming language called Uhhlang. In this language the only valid tokens (after comment removal) are hesitation words in various languages. For example: uh/erm (from English), euh (French), äää (Estonian), εμ (Greek), अ (Hindi). I've also included some RTL language tokens.
Code repo including example programs: https://codeberg.org/mattp/uhhlang/src/branch/main
Blog post: https://www.peperell.com/2026/04/01/uhh-er-erm.html
Human-generated input, corrections etc from sufficiently advanced / native speakers of languages other than English is welcome.