"They are mothers and fathers."

Translation: Muñi kepī issi.

[LennartC]

Is it kepī instead of kepi because it is Mothers AND fathers?

[Liza_72]

Yes. Instead of using the word "and" when listing things or describing multiple things, the last vowel (I think) becomes elongated. :)

[AviAviAvian]

The pattern I have noticed is (Young) (Old) (Action) (Link)
and usually with genders its (young girl) (young boy) (older girl) (older boy) (woman) (man) (action) (link).

Hope that helps!!

[AJ72T]

There was a sentence earlier that said 'kepi muñii kirini issi', but I like your theory.

[IamNative]

Sometimes it is muñī and sometimes it corrects muñi. I wonder why the accents are different?