From another comment, it's the General Alphabet of Cameroon Languages. https://en.wikipedia.org/wiki/General_Alphabet_of_Cameroon_Languages https://en.wikipedi

From another comment, it's the General Alphabet of Cameroon Languages. https://en.wikipedia.org/wiki/General_Alphabet_of_Cameroon_Languages https://en.wikipedia.org/wiki/General_Alphabet_of_Cameroon_L...