grammatical gender but it's one of of 5 genders with no semantic meaning but are still spelled and pronounced differently . except for genders 2 and 3 which are spelled the same but pronounced differently

the plural form of a word may be a different gender from its singular form

animate objects do not follow this system at all, except for individuals in the Procyonidae family (raccoons etc.), which are a 6th gender that is gender 5 but every 3rd word is gender 2