I know a fair few phrases of Welsh, having been out with a Welsh lass for a year. Sadly some or the phrases don't mean what I was told they do!
I speak halting Gaelic, schoolboy French, and fairly decent German. Would love to learn Cornish, my Dad's side or the family are from Cornwall of Breton Celt origin, and my dear departed Grandad was a Kernowen speaker. Sadly Poshshire is not knee deep in Cornish language tutors so I can't realistically ever see it happening.
I also speak Shetlandic, which is quite a heavy patois or dialect rather than a language. Having been to public school and live most of my adult life in England I have almoat completely lost my islands accent (Mrs D reckons she hears it occasionally in some words) I find a small majority of my countrymen are anally retentive Scots who can be a bit nasty about what they believe an Englishman in their midst - that's when I break into Shetlandic to show it is they who is the soft southerner and not me.
Language interests me greatly and I wish I'd tried harder with it at school.