By the homework of the school, I will check the overseas travel circumstances of American people.

Therefore it is a question, can you complain in the middle of overseas travel?
(For example, for the correspondence of the hotel.)

I am sorry in poor English.

Please reply it as soon as possible!

海外旅行しながら文句できるかという質問ですか？

If you're asking whether one can file a complaint with an American hotel while in the middle of one's vacation, the answer is definitely yes. Perhaps the TV doesn't work. Perhaps you found lice in the bed. Perhaps the air conditioner doesn't work. Perhaps the guests in the room next door are too noisy and won't agree to quiet down. There's a long list of possible things you could complain about, but if it's a question of whether you're allowed to complain about them or not, well certainly you're allowed to complain about them.

If you're asking whether an American on an overseas vacation can file a complaint while he's in the middle of his trip, I guess the answer would entirely depend on the customs of the city he's staying in and his awareness of and respect for these customs. In general, Americans will complain about poor service in the hopes of receiving better service rather than keep quiet and continue to suffer with the poor service. But that's a very, very general rule, and I think it really does depend on both the individual and the situation he finds himself in.