If the GM makes it clear that a certain feature exists in their setting...

[Darth Ultron]

I think it's interesting that everyone's basically explaining the character role arc of Daniel Jackson in response to this thread.

Also, in both a TV show or a RPG, doing the whole ''interpreting unknown languages is a huge waste of time. "

It's really bad enough for a DM, to say in English-"OK, the orc is speaking in Ork, so no one can under stand the orc except Bob's character". Then the DM says, in English "Me orc will attack as you are good guys" and all the other players have to pretend they did not hear that...and just sit there. Then Bob will turn to the other players and have ''his character translate what the orc said" that everyone already heard.

It's worse if the game has a check, where Bob needs to roll like a 10, with a +22 modifier.

This is why both TV shows and RPGs just skip it.