en_tn_lite_do_not_use/1co/06/06.md

But one brother sues another brother, and this is done before unbelievers

"But brothers who have disputes with each other ask judges who do not believe in Christ to make decisions for them"

brother sues another brother

Here "brother" means fellow Christian, including both men and women.

and this is done before unbelievers

Possible meanings are 1) "and unbelievers in the community see brothers disputing with one another" or 2) "and the brothers go to unbelieving judges to make decisions for them"