Many years ago, when I was studying Spanish, we were on holiday in Menorca. We wanted to visit a little cove that required quite a long walk through some rough and wooded terrain, quite difficult to find with no signposts, but you sort of followed your nose. We managed to find it and it was well worth the effort.
On our return, as we were nearly at the car, we were asked for directions, in very broken English, by a young Spanish man. I thought I'd be helpful and explain the route to him in his mother tongue. He followed me quite well, but it was only when he asked a question that I realised he was Italian
. I apologised profusely, but he smiled and said the languages are similar enough for him to understand everything I'd said!