Pronunciation: [d͡ʒˈə͡ʊɪn] (IPA)
Correct spelling for the English word "Joayn" is [d͡ʒˈə͡ʊɪn], [dʒˈəʊɪn], [dʒ_ˈəʊ_ɪ_n] (IPA phonetic alphabet).
Correct spelling for Joayn