[tough]

funnily enough, the relation comes from a french jurist's last name

from their repo: https://github.com/CatalaLang/catala

> The language is named after Pierre Catala, a professor of law who pionneered the French legaltech by creating a computer database of law cases, Juris-Data.

[kiliancs]

Also in their website https://catala-lang.org/en/about#naming

[darkwater]

Name that is almost certainly related to Catalonia as well.