I thought the first person singular was "jorrāelzen", third person singular was "jorrāelza", and third person plural is "jorrāelzi". How come this example is saying the 1st sing. is "jorrāelzi"?
Unless...is "jorrāelzen/za/zi" the accusative and "jorrāelzi/z?/z?" is the nominative?
To answer your question: "The girls love the mother" translates to "Riñi muñe jorrāelzi" where jorrāelzi is the 3rd person plural, which conjugates according to "riñi" which is plural. There is not I/me anywhere in the sentence, so there's no reason for the verb to be 1st person singular.
Also, there is no such thing as nominative or accusative verb conjugations. Verbs only conjugate, and don't decline.