Additional unlicensed language packs found in the application folder

Presently I am using the application ‘Photoshop CS5’ for my different picture related activities. It has been okay for the last few months. Today morn, as I opened the application as usual, I got the following error whose code is ‘Error 16’ along with another error dialog box.


Additional unlicensed language packs found in the application folder. Please restart the application.
Do you know why this happens? Please give me a solution.
