Kurds make up 20 percent of the nation and the minority has been fighting both a political civil rights campaign and a decades-long violent insurgency.
The letters are commonly used across the nation despite the official ban. But there have been several high-profile government attempts to enforce the ban.
PRI.org reports that the mayor of one of the nation's cities was prosecuted in 2007 after sending out a greeting card celebrating the Kurdish New Year which contained the letter "w."
The case was later dropped.