In the very short time since my last post, Img has started using the first person pronouns a lot more, so I think we're at some kind of tipping point. This morning she padded into our bedroom and told me "I'm a bit grubby" (a safe bet for a toddler, though she didn't seem to be any more so than usual); when I picked her up from nursery she ran to me and said "MY mummy!"; when a dog barked loudly as I was pushing her home in the buggy she said "That noise is waking me up" (ironic given how hard she was resisting going to sleep at the time) — and there have been lots of other examples. We definitely get more "mine" than "me" or "I", but then defining the boundaries of "mine" is a big thing in her life at the moment. (Rule of thumb: if she can see it, it's hers.)
Yesterday we also learned a new word, "argycue", as in:
Img: "Imi and Iris had an argycue." Me [trying not to laugh]: "Oh dear, what were you arguing about?" Img: "Smatching."
I like the idea of it being a cross between an argument and a barbecue, I guess where one of the participants gets roasted.