You are abroad and are invited by a family. A nice thing, if it weren't for the language problem. You understand some things, but not everything. If there are tensions, then the catastrophe is there. The foreign guest is quickly pushed into the corner verbally. There is no trace of fairness or consideration for language problems. The ignorance of the language is not seen as a handicap, but as a chance to make fun of the foreigner. Goodbye fairness !
Later one can still report to the environment of it. And strongly say the untruth. The foreigner stands there as a complete idiot. The own superiority is proven.

This has changed now, at least partially. There are translation programs, which come very close to good German, French...