When most people say you should watch your language in front of your daughter, they usually mean you shouldn't use the "f" word. I don't give a damn about modeling so-called "ladylike" behavior, though. I'll substitute "fudge" for "f*ck" when I remember to, sure, but in the big scheme of things a swear word here or there isn't the end of my world. I do, however, definitely think there are things you should never say to your husband in front of your daughter. After all, not only do kids have a habit of hearing everything you don't want them to hear, but they internalize the unsaid messages behind your words, too.
For example, when you ask, "Does this make me look fat?" your daughter hears, "Fat is bad, and I don't want to be bad." I accept that I have body image issues and a crises of confidence about whether or not I am good enough. Those are my demons, though. I don't want my daughter to think that calories are anything other than energy in food. I don't want her to believe that "fat" is an insult and not just a substance in our bodies. So by changing the way I talk to my husband about food and my body, especially when we're in front of our daughter, I have the chance to make a difference for her and me. I want her to be proud of being a woman and to grow up with feminist values. I would not be reinforcing those values if I insulted myself or other women in front of her, or reduced what it means to be a woman to a stereotype.
Also, I take my responsibility as a role model for my daughter extremely seriously. My relationship with my husband is one of her first examples of a romantic, adult relationship. As much as my husband pisses me off sometimes, I don't want my daughter to hear us fight or hear me insult him, and I want us to present a united front in parenting decisions, even if we disagree later o and behind closed doors. There are so many ways we all should watch our language when talking to our partners in front of our daughters, and here are just a few: