I think at that point there has been a really major communication breakdown that needs to be addressed over and above the issue at hand.
(And, by the by, I think if you think using the terminology the game uses to describe a campaign will automatically prevent communication problems with getting the players on the same page, you're an incredible optimist.)
Shared terminology wont solve everything. But it is a start and might solve a lot of these communication problems.
I believe as a DM, the onus is on the DM first to explain their game.The rulebook has rules for lots of things that aren't combat. It seems reasonable to take at least some of those into account when making a character.
If the player isn't sure about what kind of game to expect it makes sense to me to talk to the DM.
Since it's their setting and campaign.
Since they have authority.