31 Days to Surviving NaNoWriMo - Creating A LanguageSunday, October 14, 2012
To start from the beginning, go here.
Day 13 - Pad Your Word Count
There may be times when you want to create a special language for a novel (obviously, to be written in your own language, with bits of the new language here and there). That's a pretty big undertaking. I haven't actually attempted it myself, but I do have some helpful links for you :)
-Creating a Language for NaNoWriMo (NaNo forum thread)