Pronunciation: [ˈɔ͡ɪzɡ] (IPA)
Correct spelling for the English word "OIZG" is [ˈɔ͡ɪzɡ], [ˈɔɪzɡ], [ˈɔɪ_z_ɡ] (IPA phonetic alphabet).
Correct spelling for OIZG