You can tuna fish now. Science has advanced. https://hackaday.com/...

That's TempleOS.

pretty Catholic

I don't know what led you to believe that, but just look at wikipedia, only 56% of the population is catholic, 37.5% being non practising (and, in my experience as a spaniard, agnostic) and 16% actually practising.

https://en.m.wikipedia.org/wiki/Spain