Here is a list of English words that contain diphthongs that are similar to the Lojban diphthongs. This list does not constitute an official pronunciation guide; it is intended as a help to English-speakers.
Lojban English ai “pie” ei “pay” oi “boy” au “cow” ia “yard” ie “yes” ii “ye” io “yodel” (in GA only) iu “unicorn” or “few” ua “suave” ue “wet” ui “we” uo “woe” (in GA only) uu “woo” iy “million” (the “io” part, that is) uy “was” (when unstressed)