leave well enough alone

Verb

 * 1) To leave something alone; to avoid trying to correct, fix, or improve what is already adequate.

Usage notes
The usual form of the expression in the UK is leave well alone.

Translations

 * Esperanto: plibono estas malamiko de bono
 * Finnish: jättää rauhaan
 * French:, laisser tranquille
 * German: das Bessere ist des Guten Feind
 * Polish:
 * Romani: o feder xatarel, peravel o śukar
 * Russian:
 * Ukrainian: працю́є - не чіпа́й, зали́шити в спо́кої