Definition of if it ain't broke, don't fix it in English:

if it ain't broke, don't fix it

informal If something is reasonably successful or effective, there is no need to change or replace it.
More example sentences
  • And absent some kind of explanation, people may remember an old saying: If it ain't broke, don't fix it.
  • Most small businesses, rightly, resist change: if it ain't broke, don't fix it.
  • I am not a revolutionary, and generally espouse the "if it ain't broke, don't fix it" school.
See parent entry: broke

Definition of if it ain't broke, don't fix it in:

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Word of the day guzzle
Pronunciation: ˈgəzəl
verb
eat or drink (something) greedily