The Welsh language amuses me because it seems unreal. There is a town in Wales with the name Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch. It was renamed to that in 1860 to attract attention. So it is a bit tainted as an example of amusing Welsh.
The town is amusing for being so long. Ordinary Welsh words are amusing (to me at least) mostly due to the lack of vowels, that is English letters that we know as vowels. For example, “Bwlchgwyn” and “Cwmtwrch.”