Frisian translation of diphthongization is 
diphthongisaasje

Translate diphthongization into other languages

• in Afrikaans diphthongization
• in Danish diphthongization
• in Dutch vervlakking
• in German diphthongierung
• in Icelandic tvíþétting
• in Norwegian diphthongization
• in Swedish diftongisering
• in Yiddish דיפטהאָנגיזיישאַן
• in Luxembourgish Diphthongong
• in Scots Gaelic dà-fhàsachadh