Question about using italics in writing.

I'm writing a book based in a foreign country. Though most of it is in English, I do let it be known that the general conversations are taking place in the foreign language. One of the ways I do this is to interject some of the phrases in that language. When I do this, I use italics. Now, here's the question. Since I'm dealing with a college campus, the teachers are referred to profesors or profesoras. If it's used like, "Profesor Reyes" or if the student calls him, profesor, in those instances, do I still have to use italics? I'm asking because it looks odd. I'm afraid I'm going to always have a shot gun splatter of profesor, Profesor Reyes and Reyes.