If you want to be sure your content isn't duplicated by other sites, then you better check it on a regular basis with the Copyscape tool that perfectly determines instances of content duplication.
Haddii aad rabto in aad hubiso in macluumaadkaaga aan lagu duubin goobaha kale, markaa si fiican ayaad u hubineysaa si joogto ah qalabka Copyscape kaas oo si fiican u go'aaminaya dhacdooyinka nuxurka qoraalka.