Somehow my Mathematica Ver. 9 uses non English language in Suggestion Bar. I would like to change Suggestion Bar language back to Enlish. I can not change it through Edit>Preference method. How do I do it ?
I don't believe there is a specific option for language used in the Suggestion Bar.
You can however find options for the over-all language used in your copy of Mathematica in the preferences dialog.
The preferences dialog can be found in Edit > Preferences on Windows and Mathematica > Preferences on Mac.
In the preferences dialog under "Interfaces" you will see an option to change the default language used by Mathematica.
thanks for the suggested solution. It has now been fixed.