How to change language name (localization), short name and code of the language in osCommerce ?

1. Lets change German for example from 'German' to 'Deutsch'.
2. Also we'll change 'ge' to 'de'.
3. visit this link.
4. Login with username and password.
5. Click Localization in left menu and then Languages.
6. Choose language you want to modify and click Edit.
7. Change German to Deutsch and also ge to de.
8. Save your work and its done!