I learned some Irish when I was younger. At the time I had an older relative nearby with whom I could practise, but he died when he was still learning the basics. He also spoke & wrote German. One of his brothers learned 2 European language at town's "Night School" when he retired, so had 4 languages. Their elder brother used to travel to Irish classes in Manchester as a young man and won medals. They also had Church Latin of course, from childhood. (Prayers at home were Irish.) They'd all left school at 13 or 14 but never stopped learning.
I'm also interested in "Old English" languages, Anglo-Saxon and Norse. I learned an Anglo-Saxon word on here.
I discovered from a TV series about the Vikings, that some words familiar to me were Norse.