Slightly off-topic, a little anecdote from my last day in Wales -- I had been briefly talking to another hotel guest (first-language Welsh speaker) at breakfast, a bit in Welsh and a bit in English, and she had mentioned that Welsh is difficult to understand, especially outside of situations where the number of reasonable responses is limited.
Then a bit later, she was talking to the person taking orders for warm breakfast items (toast and/or eggs?) in Welsh, and then decided on Jỳst tost, plîs (and on being asked, gwyn neu frown?, "white or brown?"), brown.
I think most English speakers would have understood that bit of Welsh