Home Misspellings How to spell diphtong? Diphtong or diphthong? Which one is correct? by hersey October 23, 2018 Reading Time: 0min, 7sc + - 0 Diphtong or diphthong Which one is correct? You can find the answer below. Incorrect Diphtong Correct Diphthong You can find more information about Diphthong word here. Rate this post Correct spelling of DiphtongHow do you spell Diphtong