We have made available updated Language Packs for users using Windows Vista SP1 as well as those running Windows Vista RTM. For those running SP1, the Language Packs should be showing up for you under Windows Update.

The specific language packs which are being released are as follows: 
German 
English 
Spanish 
French 
Japanese 
Korean 
Bulgarian 
Czech 
Danish 
Greek 
Estonian 
Finnish 
Hungarian 
Italian 
Lithuanian 
Latvian 
Norwegian 
Dutch 
Polish 
Portuguese (Portugal) 
Romanian 
Slovak 
Slovenian 
Swedish 
Arabic 
Hebrew 
Croatian 
Portuguese (Brazil) 
Serbian (Latin) 
Thai 
Turkish 
Ukrainian 
Chinese (Simplified) 
Chinese (Traditional) 
Russian