12. The system of claim 9 , further comprising a vocabulary updater module that is programmed to remove one or more words from the client vocabulary.
12. The system of claim 9 , further comprising a vocabulary updater module that is programmed to remove one or more words from the client vocabulary. 14. The system of claim 12 , wherein one or more words from the client vocabulary are assigned a frequency value that indicates how often the word is used and a recency value that indicates when the word was last used, and the client vocabulary updater module is further programmed to remove a word selected from the client vocabulary based at least on the frequency value or recency value associated with the selected word.