郷ごうに入いっては郷ごうに従したがえMeanings1expressionwhen in Rome, do as the Romans doproverbProverb advising to follow the customs of the place you are in.海かい外がいに住すむなら、郷ごうに入いっては郷ごうに従したがえだよ。If you live abroad, you should do as the locals do.