The Welsh language is made up of 29 letters, 7 of which are vowels (a, e, i, o, u, w, y) .  ‘J’ is used as a 29th letter as there is no equivalent letter/sound in Welsh for translation purposes.

Unlike the English alphabet, we don't have any of the following letters - K , Q , V , X  and Z. 

On the other hand, we do have double letters in our alphabet - CH, DD, FF, NG, LL, PH, RH and TH. Some of these letter sounds exist in English, but they are not classed as being one single letter.