The Tongan Alphabet Published on January 28, 2013February 21, 2013 by Hema Fifita Motuʼaleá Faka Tonga 17 letters in the Tongan alphabet. 5 vowels; a-e-i-o-u 12 consonants; f-h-k-l-m-n-ng-p-s-t-v- ‘ ‘ Faka’ua (glottal stop) is considered a consonant and the last letter in the Tongan alphabet AdvertisementShare this:PrintTwitterFacebookTumblrPinterestLike this:Like Loading...