Translation of "Meddle" in French

Don't meddle in his affairs.

Ne te mêle pas de ses affaires.

Don't meddle in my affairs.

Ne te mêle pas de mes affaires.

Saint-Cyr believed soldiers  should not meddle in politics,  

Saint-Cyr croyait que les soldats ne devaient pas se mêler de politique

It is not my part to meddle in your affairs.

Je n'ai pas l'intention de m'immiscer dans vos affaires.

- Don't interfere in other people's affairs.
- Don't meddle in other people's affairs.
- Don't interfere in others' affairs.
- Don't meddle in things that are none of your business.

Ne te mêle pas des affaires des autres.