Some research is good: As always, try to read up on local customs and the culture.

How could he have lived this long and not known that much about local customs?

How sensitive do I have to be to local custom?

While building the international school they stay with indigenous families and learn local customs.

Following the local customs soon they were no better than slaves.

I wanted to hug the man but didn't know local custom.

However, this is simply a local custom and it remains a fell.

The judicial system is based on English common law and local customs.

She hoped he wouldn't get in trouble with local customs.

The difference appears to be the result of nothing more scientific than local medical customs.