Multi-language support is native in Windows 7 Enterprise and Ultimate editions, but, following this tutorial you be able to alternate entire many languages in Professional and Home Premium editions.
First you’ll need of Vistalizator. This application enable to install muti-language support in all Windows 7 editions and, how it’s portable, you don’t need install it. Download it clicking here.
After, download the languages for architecture x64 (64 bits without Service Pack or Service Pack 1) or x86 (32 bits without Service Pack or Service Pack 1).
Now run the Vistalizator and click in “Add languages”.
Browse for language file that you desire and click in “Open”.
Will be show the message below, then click in OK to proceed
A new window will be open with language data and your description, then click in “Install Language”.
Wait the installation process be done.
Now, the Vistalizator will show for you the languages installed in your machine and there will be the recently installed language.
Reboot Windows and voilá. 
Now you have Windows 7 Professional/Home Premium with multi-language support.
The only bad thing that I noticed was: all time that you want to change the language, you must to use the Vistalizator, because the Windows 7 Professional and Home Premium doesn’t support this feature natively.
June 6th, 2011 on 12:17
I have win 7 pro 32 bit. When I try to use vistalizator it tells me that my build – 7601 – cannit be used with vistalizator
June 8th, 2011 on 10:00
Are you running Windows 7 with SP 1?
If yes, click right button in Vistalizator exe, click properties and, in compatibility tab, choose Windows 7 (with not SP1).
Maybe this should bu useful.
July 10th, 2011 on 05:40
Andre. Thank u so much. it working fine.
October 12th, 2011 on 15:55
I’m also thanks for you . Andre.
because before same problem in my laptop but now salved that ..
thanks so much
October 12th, 2011 on 16:26
i have more one problem in my laptop (dell insp N5040). there are bluetooth is not working. when i install bluetooth that model driver is same problem.
i’m watch to device manager. there are bluetooth driver is yellow problem.
I am sure if you can help me.
November 23rd, 2011 on 03:09
Windows 7 SP1 Korean
I got new laptop with Windows 7 SP1 Korean and i converted to English using your vistalizator tool with Express option.But after Converting to English i have 2 issues as as below:
1)Windows Update does not work or its Control Panel item is blank or untranslated.
(I even replaced the windows update agent version files 7.5.7601.17514 files with 7.4.7600.226 version files in system 32 by changing permission.
)
2)After Changing to English ,it shows Windows 7 is not Genuine if i revert back to Korean the Windows 7 is Genuine it says.
Please help me
November 23rd, 2011 on 12:26
Hi!
Same with me. After runs this tutorial the “Windows not genuine” alert will shows, there is not to do to disable them. To update your Windows, you needs back the language to korean, so will work fine!
November 24th, 2011 on 12:50
Hi,
I would like to share that i was able to fix the windows the windows Update in Windows 7 SP1 if i download the load the language pack from the link
http://bx.businessweek.com/windows-7/view?url=http%3A%2F%2Fwww.pcdiy.com%2F146%2Fwindows-7-service-pack-1-language-packs-download
and follow the steps given in this video http://www.youtube.com/watch?v=NwdmukiE7xM
to install language pack
I am working on geniune issue…if i am able to fix i will share…
November 24th, 2011 on 15:27
Awesome!!! Thanks for sharing !
Later I’ll add this procedure here!
December 6th, 2011 on 11:13
Hi Andrew ,
If your using DELL laptop,the easiest way is to download DELL English Windows 7 OEM DVD from torrents and reintsall the Windows 7.Later Reinstall the drivers from Drivers CD. Genuine issue will be solved.
Cheers
Nagaraj
January 3rd, 2012 on 18:36
Hi, I just installed “Hungarian” language pack on my brand new HP Pavilion DV7-6B32 laptop, (to send it to Hungary as a gift) after couple of minutes I got this message “the computer is not running genuine Windows”
Please help!
Thanks!
January 3rd, 2012 on 20:54
Atila, the solution posted by Nagaraj above not work for you?
You searched for download genuine HP Hungarian Windows 7 OEM?
February 20th, 2012 on 17:43
thanks man!!!
May 31st, 2012 on 03:30
pls donload english language its very urgent
June 3rd, 2012 on 20:00
many thanks this article is really helpful
i have English now on my German windows 7
June 27th, 2012 on 06:14
Set windows update for manual installation.
Uninstall kb971033, reboot and activate win.
Start winupdate, uncheck and with rightclick hide kb971033, optionally install other updates.
You can set winupdate on auto again, kb971033 won’t install and you won’t have the wat issue until kb971033 is left out.
July 26th, 2012 on 02:49
It s perfectly working for me with simplified Chinese.
Thank you so much for sharing the trick !!!
November 19th, 2012 on 12:54
I just upgraded from XP to Win7 home premium 32-bit and understand miltu-languages are not natively supported (they were on XP). Clicked on your download Vistilizator “here” link and it didn’t work. Can you check this? I want to get my bilingual capability back again asap! Thanks.
November 20th, 2012 on 14:38
Thanks for advise. Links have been fixed.