As someone who is fluent in Vietnamese, this application is upsetting. The translations are very loose in some circumstances, and some could get you into trouble. For those translations that use gender specific words, it doesn't provide the options depending on whether you're addressing a male or female. It defaults to "Anh" (older male), which is fine, unless you cone across a female. Then if there is a HUGE AGE GAP, then you're really offending the person you're addressing.