The following excerpts are from Want Words website:

“Interpreting in court: step by step guide

1. Arrive some time earlier to have enough time to report to the desk, sign in and find the courtroom.
2. Inform the usher and clerk that you are the official interpreter.
3. The defence may ask you to have a conference with the client.
4. On entering the courtroom, you will have to take the oath or affirm in the witness box.
5. Then, you will be asked to help in swearing in the witness.
6. You will be seating or standing next to the defendant or witness and interpreting everything what is being said in the courtroom.
7. After the trial is over, you have to be officially released by the court.

Interpreter’s Oath

“I swear by Allah/Almighty God, etc. that I will well and faithfully interpret and true explanation make of all such matters and things as shall be required of me according to my best skill and understanding”

Interpreter’s Affirmation

“I do solemnly declare that I will well and faithfully interpret and true explanation make of all such matters and things as shall be required of me according to my best skill and understanding”
Resources

Interview with a court interpreter
The Role of the Interpreter in courts
You be the judge ”

Read more.

See: Want Words