Italics in one language do not necessarily survive translation into another language. Then there are foreign words and phrases. In this case, what is sauce for the gander is not necessarily sauce for the goose. While savoir-faire may look fine italicized in English, it doesn't take too much savvy to figure out that it might not look too sharp if it were italicized in a French text. Italicization may even vary from country to country within the same language.
Spanish rodeo is more likely to be italicized as a foreign word in London than in Laredo.
In like fashion, Mexicans would never italicize tequila, but Uruguayans might. Words used as examples are italicized in any case, foreign or native. Adaptation No. 2. A word that is foreign in one language may not be foreign in another. Adaptation No. 3.