A thing well said will be wit in all languages.

Real insight survives translation because its force lies in the thought rather than in the particular words. A clever pun dies at the border, but an observation that captures something true about people lands in any language and any century. That makes a useful test for your own speaking and writing.

When you have phrased something you are proud of, try saying the same point in the plainest possible words. If it still holds, it was genuinely well said, and if it collapses, the cleverness was doing the work the idea should have done.