en_tn/deu/27/12.md

These tribes

Here the metonym "tribes" refers to the people from the tribes of Simeon, Levi, Judah, Issachar, Joseph, and Benjamin. Alternate translation: "The people from these tribes" (See: rc://en/ta/man/jit/figs-metonymy)

Mount Gerizim

A small mountain north of Mount Ebal. See how you translated this in Deuteronomy 11:29.

Joseph

This combines the tribes of Ephraim and Manasseh, who were descendants of Joseph.