Anthropologist H. Otley Beyer describes Yogad as a variant of Gaddang language and the people as a sub-group of the Gaddang people in his 1917 catalogue of Philippines ethnic groups.[3]Glottolog presently groups it as a member of the Gaddangic group; in 2015, however, Ethnologue placed Yogad as a separate member of the Ibanagic language family. Godfrey Lambrecht, CICM, also distinguished separately the peoples who spoke the two languages.[4]
Alphabet
The Yogad alphabet has 21 letters composed of 16 consonants and 5 vowels.[5]