The story I'm writing has characters that speak a different language from the protagonists.
I'm thinking about building them a conlang (constructed language) but I don't know the best way to go about.
The world they inhabit is culturally and technologically and geographically similar to our own. That said I've struggled with naming and languages.
Should I create a conlang completely from scratch OR should I modify an existing language?
By modify and existing language I mean is their language how for example French would have evolved on this planet and in this culture in this time period?
how, for example, Vulgar Latin would have evolved in their region/culture/time into a brother/sister language to French/Spanish/Portuguese/Italian/Romanian etc?