en_tn/act/18/12.md

Gallio became governor of Achaia

Achaia was a Roman province which Corinth was part of that is now modern southern Greece. (See: rc://en/ta/man/translate/translate-names)

brought him before the judgment-seat

The Jews took Paul by force and brought Paul before the court. Alternate translation: "took him to be judged by the governor"

contrary to the law

The Jews were purposely making Paul's offenses against Jewish laws and customs sound like crimes against Roman law.