how to change gimp language setting

After changing some regional and language settings in my vista to Japanese, if I run gimp, it displays unreadable character instead of English. I found this url is very helpful to change the language of gimp (in XP, Linux, and MacOSX):
http://docs.gimp.org/en/gimp-fire-up.html#gimp-concepts-running-language

For vista, it is very similar with XP, example is to use English (en):

1. go to control panel, system, advanced system settings
2. click Environment variables..
3. add new environment variable (click New...):
   variable name: LANG
   variable value: en
4. Ok. Finish.

That's all :)

Cannot display Hidden Folders and Files

If you have just infected by some worm or mallware, probably your windows cannot display hidden folders and files although you already set the hidden files options from explorer.
Copy paste the following text to notepad, and save it (for example: repair.reg), then double click to make changes to windows registry.

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden]
"Text"="@shell32.dll,-30499"
"Type"="group"
"Bitmap"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,\
00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,53,00,\
48,00,45,00,4c,00,4c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,34,00,00,\
00
"HelpID"="shell.hlp#51131"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN]
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"Text"="@shell32.dll,-30501"
"Type"="radio"
"CheckedValue"=dword:00000002
"ValueName"="Hidden"
"DefaultValue"=dword:00000002
"HKeyRoot"=dword:80000001
"HelpID"="shell.hlp#51104"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL]
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"Text"="@shell32.dll,-30500"
"Type"="radio"
"ValueName"="Hidden"
"DefaultValue"=dword:00000002
"HKeyRoot"=dword:80000001
"HelpID"="shell.hlp#51105"
"CheckedValue"=dword:00000001

That's all :)