Non lo so. Learn Unstarted Literal Breakdown Recording English Italian Learn not non Learn it lo Learn I know (information) so Learn Summary The Italian translation for “I don't know.” is Non lo so.. The Italian, Non lo so., can be broken down into 3 parts:"not" (non), "it" (lo) and "I know (information)" (so). Opposite Recording English Italian Learn I know. Lo so. Learn Practice Lesson "I don't know." Practice (4) Lesson Learn Lesson words I know (information), not, the (singular masculine) etc. View all lesson words Lesson phrases I don't know. etc. View all lesson phrases Themed Courses Miscellaneous 5 Miscellaneous 6 Part of Speech Courses Adverbs 1 Pronouns 1 Verbs 2 Verbs (Present tense, 1st person singular) 1 Acknowledgements Audio Google text-to-speech