I got this question and almost laughed. Before I answer this question, let me tell you why.

When I proposed to my wife I was actually looking for a wife. At that stage I could have asked her to be my wife, fiancée was almost playground for me. My reason has to do with past experience. However, I had to cool my jets and work with a few crucial variables.

Anyway, to answer this question, there are several things to consider.

Consider the level of your relationship/acquaintance.

You might shock the woman by just asking her to be your fiancé if you just met her two weeks before. Catch my drift? However, if you have been going out for a while, it just might be the appropriate thing to say. Ultimately you are the judge of this one.

What would be socially acceptable?

You exist in a community. There are some things that are expected of you otherwise you get filed in the “weird” department. So would it be culturally/socially acceptable to propose by asking her to be your “fiancée”?

But Seriously

Do  you want a fiancé or a wife? Fiancé is really a term referring to a transition isn’t it? I would shoot for the real thing if I were you.