One time I sent a student out of the room for use of English and she came back with some chips and a drink after a nice long walk around the building. That’s not what I meant to have happen. So, when I give students time outs for English now, I keep them in the room.
Now, students who speak English are invited to observe, but not participate, in the class. They have been denied the right to participate because of their (even once) speaking English in a way that is not helpful to the class.
I just tell the students to go to the back of the room, where they must stand and observe for ten minutes, at which time they are allowed to return to the class when they can again participate in the class. It’s like a time out for them.
So far it’s working. I’ll need a bit of time to see if it is a good solid move for discipline, but my feeling is that it is going to work. I think the key is in their being made to stand at the back of the room and be quiet and continue to make eye contact with me as usual, and not sit or lie down.