en_tn_lite_do_not_use/rom/09/14.md

What then will we say?

Paul is using the question to get the attention of his readers. (See: rc://en/ta/man/translate/figs-rquestion)

Is there unrighteousness with God?

"Is God unrighteous?" or "Is God unjust?"

May it never be

"That is not possible!" or "Certainly not!" This expression strongly denies that this could happen. You may have a similar expression in your language that you could use here.