en_tn_condensed/act/19/38.md

Therefore

"Because what I have just said is true." The town clerk had said in Acts 19:37 that Gaius and Aristarchus were not robbers or blasphemers.

have an accusation against anyone

The word "accusation" can be stated as the verb "accuse." Alternate translation: "want to accuse someone" (See: rc://en/ta/man/translate/figs-abstractnouns)

proconsuls

the Roman governor's representatives who made legal decisions in court (See: rc://en/ta/man/translate/translate-unknown)

Let them accuse one another

This does not mean Demetrius and those with him will accuse each other. It means this is a place where people in general can speak their accusation. Alternate translation: "There people can accuse one another"