Individual Office Language Packs are available for the following languages:
Arabic, Brazilian Portuguese, Bulgarian, Croatian, Chinese (Simplified), Chinese (Traditional), Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Italian, Japanese, Kazakh, Korean, Latvian, Lithuanian, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian Latin, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, and Ukrainian.
A Language Pack enables a user or organization to add localized Display, Help, and document-proofing tools for an additional language to their base Office 2010 language deployment and to easily switch between languages.
Language Packs enable localized Menus/Display, Help, and document proofing tools for most Microsoft Office 2010 applications, including Word 2010, Excel 2010, PowerPoint 2010, Access 2010, Outlook 2010, OneNote 2010, InfoPath 2010, Publisher 2010, Project 2010, SharePoint Workspace 2010, Visio 2010, and the Microsoft Office suites containing these products. Language Packs are not supported on Word Starter 2010 and Excel Starter 2010. Access 2010 and Project 2010 are not supported in Hindi.
In addition, Display languages for Microsoft Office Tools, such as Clip Organizer, Document Imaging, Document Scanning, and Picture Manager, are localized when Language Packs are enabled. Application localization varies by language. Consult the Office Language Packs proofing-tools comparison page for more details.