Apparently very easy to enable:1: Download iBackupBot for Mac or Windows.
2: Open iBackupBot and locate your most recent iTunes backup. (You will be restoring to this backup, so keep that in mind.)
3: Navigate to Library/Preferences/com.apple.keyboard.plist and open the file. (If you’re running the trial version of iBackupBot, press cancel when the warning message pops up and continue.)
4: Add this code at the bottom: <key>KeyboardAutocorrectionLists</key><string>YES</string>
5: Save your edit and restore your iPhone or iPod touch from the modified backup in iBackupBot.


