Ok, since I live in sweden I am in a legally recognised relationship. We got married last year, but thanks to the lovely people in the swedish government, we aren’t actually married, we are “Registered Partners”. A disgusting phrase if I ever heard one… makes me feel like a dog for some reason.
I don’t often refer to my wife as my wife because I think it sounds weird, possibly because being married feels like such a grown up thing to be, and therefore not in key with the rest of my life, which is ruled by studying, eating junk-food and playing video games.
I usually say “I am married to a girl” when I let people know for the first time, then after that refer to her by name, or use the swedish eqivilants of better-half, she-who-must-be-obeyed, or just girlfriend.
When its none of their business that I am together with a woman, or when its only likely to make a situation more difficult (like if I am getting hit on by a guy in a bar), then I use the very handy swedish word “sambo” which means “the person I live with and am romantically involved with” 
totally NGS (non gender specific) and very very handy.
Iteki
PS, Ok, I give up, what the heck does YMMV mean? I think I have worked out all the other acronyms myself, even OP.