en_tn_lite_do_not_use/deu/04/48.md

Aroer

This is the name of a city. See how you translated this in Deuteronomy 2:36.

the Valley of the Arnon

This is the name of a place. See how you translated this in Deuteronomy 2:24.

Mount Sion ... Mount Hermon

These are different names for the same mountain. The word "Sion" is another spelling of "Sirion" (See: Deuteronomy 3:9). See how you translated "Mount Hermon" in Deuteronomy 3:8.