Most people who think about it at all think the Welsh have too few vowels in their words.  Actually, if anything, the reverse is more likely to be true as they have seven!  Worse, it’s not just the short and the long sounds either, W is a vowel and is pronounced ‘oo’ but in several different ways, while Y actually has four pronunciations.  Thank goodness there is no place in Tethera named Llanfairpwllgwyngyllgogerychwyrndrobwll- llantysiliogogogoch!