Gallicism
noun
Gal·li·cism ˈga-lə-ˌsi-zəm 
variants or gallicism
1
: a characteristic French idiom or expression appearing in another language
2
: a French trait
Word History
Etymology
borrowed from French gallicisme, from Latin Gallicus gallic + French -isme -ism
First Known Use
circa 1656, in the meaning defined at sense 1