"They are mothers and fathers."
Translation:Muñi kepī issi.
Yes. Instead of using the word "and" when listing things or describing multiple things, the last vowel (I think) becomes elongated. :)
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!!
There was a sentence earlier that said 'kepi muñii kirini issi', but I like your theory.