en_tn/2co/10/15.md

have not boasted beyond limits

This is an idiom. AT: "have not boasted about things over which we have no authority" or "have not boasted only about things over which we have authority." See how these words were translated in 2 Corinthians 10:13. (See: rc://en/ta/man/translate/figs-idiom)

our own area of work will be greatly expanded

This can be stated in active form. AT: "God will greatly expand our own area of work" (See: rc://en/ta/man/translate/figs-activepassive)

another's area

"an area God has assigned to someone else"