I had yo go to one as a contractor at a major military aircraft manufacturer in the USA. (I actually work for a company that makes certain systems.)
I just channeled my IDF prisoner training.
I became completely the grey man. I was not late. I was not early. I sat on the side middle to the front. I read the material. I daydreamed while looking attentive. I spoke briefly when called upon. General open ended meh answers
I did play up the language thing. My English became marketedly worse than it is, to make myself annoying, and thus causing the proctor, who just spent hours saying we must be patient with those whose native language is different than ours — to become impatient and call in someone else.
Nice strategy! I am taking notes.
well played - I will keep that technique close