Here are the titles of the essay questions set since June 2009 on spoken language development:
To what extent does acquisition of language depend on children’s experiences of the world about them?
How important is interaction between children and adult speakers in the process of language acquisition?
Discuss the ways in which children develop their grammatical skills.
Discuss what you have learnt about language acquisition from children’s early uses of words and meanings.
If you're looking for possible essay titles for June 2011, it's probably a good idea to look through the questions set on the old A spec which are very similar to what's on the current spec. You can find a set of them here.