I have a "universe" in which a novelette and a short story occur. It is a war-ravaged post-apocalyptic desert. I refer to the fighters belonging to "Oasis City," as "fellaghas" the term given by the French to Algerian rebel fighters in the Algerian War. Now, my character, an Islamic guerilla, is not technically a fellagha, even though the muslim inhabitants of Oasis City are styled after Algerians in terms of their clothing. Should I use the word "fellagha," which I like more for aesthetic reasons, but is technically less accurate and obscure, or "guerilla," a more accurate word with similar connotations but lacking a) the implicit Islamic nuance and b) the flavour of the word "fellagha." Thanks for help, I've been mulling this over forever.