We have seen earlier the steps for hiding the language bar in Windows 7. If you want to unhide the language bar in Windows 7 then you can follow below mentioned steps
From Windows 7 Start menu, navigate to Control Panel
From the Control Panel Home screen navigate to Clock, Language and Region settings
In Language and Region settings, click Change keyboards or other input methods. This would display the following Region and Language window.
Navigate to Keyboards and Languages tab and click Change Keyboards button. This would launch the Text Services and Input Languages window.
In the Text Services and Input Languages screen, navigate to Language Bar. To unhide the Language Bar, check Floating On Desktop or Docked in the taskbar radio option. After making the changes click OK button to save the changes.