One of the more interesting grammatical features is evidentiallity, which requires you to indicate how you know what you say, e.g. if you saw it, deduced it, or

One of the more interesting grammatical features is evidentiallity, which requires you to indicate how you know what you say, e.g. if you saw it, deduced it, or if it's something you were told. Another is grammatical honorifics, which use suffixes to indicate your relationship with the speaker and sometimes also with who, or even what you are talking about.