I'm pretty relaxed on things so long as people stay away from references to current events, politics, pop culture, etc. As others have said, while we don't want to break immersion unnecessarily, we still need to be able to communicate our thoughts quickly and simply.
Ana enjoys drinking whiskey rather than "an amber colored distilled alcoholic beverage made from fermented grain mash". It may be a little lazy to believe that the term whiskey will be used in 25,000 or so years but, everyone understands what I mean and it's way more convenient. I doesn't mention drinking Scotch or Bourbon whiskey as those are obviously products of modern Earth. For me, another player doesn't have to say that their character enjoys drinking a Pator Pale Ale rather than the more generic "beer" so long as they don't mention the name of some RL brand.