Board Game Arena

We get a lot of traditional cardgames at BGA... most of them are traditional ones with lots of traditional "technical expressions" like:
Cribbage: Crib, His Nobs, ...
Solo Whist: Prop, Cop, ...

I do think its better to not translate them, as often these expressions are used internationally. But there seem a lot of people with a different opinion.

Is there a guideline for this? What do you think?

There's no real guideline, but I think it depends on whether there is a "local" version of the game that the general public is aware of.

For example, we have "Wiezen" in Dutch, which is based on Whist. Consequently, there are Dutch terms for expressions like Prop, so it's clearer to use them. They are also listed on Wikipedia: https://nl.wikipedia.org/wiki/Wiezen

On the other hand, Cribbage has no local variant. There are some Dutch translations, but translating terms like "crib" to the Dutch equivalent (cradle = "wieg") would mostly create confusion. Wikipedia uses the original terms in those cases: https://nl.wikipedia.org/wiki/Cribbage. Dutch terms like "roem" (glory) in Klaverjassen are probably also best left untranslated: https://en.wikipedia.org/wiki/Klaverjas

So perhaps Wikipedia is not a bad indicator.