> Japanese text written in incorrect glyph sets will stand out similarly to any native speaker of Japanese, and will give off a connotation that whoever develop

> Japanese text written in incorrect glyph sets will stand out similarly to any native speaker of Japanese, and will give off a connotation that whoever developed this app does not care about this (often large) subset of the global user population. More likely they'll think the content was written by a non-native Japanese speaker, judge whether that makes you trustworthy or not (based on personal experience or stereotypes or prejudice, probably a bit of all three (we're all human)) and then not buy from you. A good example would be Amazon listings in Japanese that Japanese people can tell were almost certainly written by someone Chinese, and then decide not to buy. If you want the cash, get a proper translation. Ironically, Japan is filled to the brim with incredibly poor English and abounds with stories of native English speakers' translations and corrections being disregarded because "it doesn't sound right"… to someone who can't string a legible English sentence together.