Pronunciation: [ɹˈə͡ʊtɑːɹˌuː] (IPA)
Correct spelling for the English word "rotaru" is [ɹˈə͡ʊtɑːɹˌuː], [ɹˈəʊtɑːɹˌuː], [ɹ_ˈəʊ_t_ɑː_ɹ_ˌuː] (IPA phonetic alphabet).