"I see the mothers."

Translation: Muñī urnen.

[JordanDugu]

so "I see the mother" would be Muñi urnen instead of Muñī urnen.... I think?

[xPsGoDWh]

No, it would be "Muñe urnen." The nominative/accusative pairs are muña/muñe for the singular and muñi/muñī for the plural.