Ferry terminals are only there to facilitate security and fast movement of vehicles I do think that ones going between two countries should have signs for both common languages within the terminal, a few people went the wrong way, I was ok as we got chatting to someone headed towards Belgium and I asked if he would let us follow until we were a mile or two into the road network to get used to the LHD system we've been fine since then.
We have awoken in France for the first day and it's a lovely sunny day pissed it down all night though.