1Proverb: when in Rome, do as the Romans do — when you enter a new place or community, you should follow its local customs and rules. A variant of 郷に入っては郷に従え with the same meaning.
留学先では郷に入れば郷に従えを心がけて、地元の生活に馴染むようにした。
While studying abroad I kept 'when in Rome, do as the Romans do' in mind and tried to fit into local life.
郷に入れば郷に従えというから、この地方の習慣にも慣れるべきだろう。
They say when in Rome do as the Romans do, so I should probably get used to the customs of this region too.
彼は郷に入れば郷に従えの考えで、どこへ行ってもすぐに溶け込む。
With his 'when in Rome, do as the Romans do' attitude, he fits in quickly wherever he goes.