Find out which language packs are installed and the build version

I was asked this question yesterday and I remember having tried to find out how to do it. Finally I took some time to search around on the net and found a post by Patrick Heyde.

http://blogs.technet.com/patrick_heyde/archive/2009/09/30/sharepoint-blow-up-in-daily-business-and-nobody-writes-important-stuff-to-the-farm-documentation.aspx

which says the following:

3. Which SharePoint language packs were installed?

Answer: check registry

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\WSS\InstalledLanguages\<LCID>

here you will see something like this:

LCID – Reg_SZ – {language pack build level}

1033 – Reg_SZ – 12.0.4518.1000

1031 – Reg_SZ – 12.0.4518.1000

…

or

LCID – Reg_SZ – {language pack build level}

1033 – Reg_SZ – 12.0.6219.1000

1031 – Reg_SZ – 12.0.6219.1000

…

Note: It’s important to have all language packs on the same build level!

To get an overview about all Microsoft LCIDs you can use this article: Local ID (LCID) chart

Thanks Patrick, in my case the build version was set to 12.0.6425.1000 which turns out to be SP2