Pronunciation: [lˈɛtɪd hˈaŋ ˈa͡ʊt] (IPA)
Correct spelling for the English word "letted hang out" is [lˈɛtɪd hˈaŋ ˈa͡ʊt], [lˈɛtɪd hˈaŋ ˈaʊt], [l_ˈɛ_t_ɪ_d h_ˈa_ŋ ˈaʊ_t] (IPA phonetic alphabet).
Correct spelling for letted hang out