I missed all the replies yesterday. My point is that I don't think that learning the correlation between some words and visual concepts qualifies as discovering language. It may be that that's as far as this approach can go so it never discovers more sophisticated constructs of language. In that case it's not different to recognizing a barking dog which is surely below "language". I am not a linguist, so not sure what qualifies as "language" officially, but intuitively this falls short.
