What does intention have to do with speech acts? An other (hi, Helen!) good question. I'll give you an example. There was a period of oh, maybe about a year or more, between my son's learning to talk and his acquisition of ready voacbulary beyond the basics. When he'd get mad at me, he'd get so frustrated trying to tell me off that he'd resort to making up words, the only one of which I remember is "meaniac".

As to intent: I think that that can vary not only from speaker to speaker, but from time to time for an individual. Do we want to make a good impression? Put on airs? Act dumb? Fit in? The list goes on and on.

There is a commercial on TV for some sort of mattress, and the couple on the screen has (supposedly) tried it. The lady says something like, "Now I can get out of bed without him...without waking him up". I would bet every cent I have (all two of them) that she had been going to say "without him waking up", but decided to opt for more proper grammar than vernacular. They were on television, after all.