Você precisa comprar o pacote de idiomas do Microsoft Office site que cerca de $ 25
No seu caso, siga este link para a versão em holandês
Descrição:
Microsoft Office Language Packs for 2007 are designed to meet the needs of multilingual individuals, families and small businesses that routinely create or edit documents and presentations in different languages. Language Packs offer a simple and cost-effective solution that provides all of the power of a fully localized version of Microsoft Office. Available in more than 35 different languages, Language Packs, which are sold individually, can be installed onto any other language version of the 2007 Microsoft Office suites or programs.
You will have the ability to customize your Office experience and to easily switch between your base language and your installed languages for your:
- User Interface
- On and Offline Help (including access to localized Office Online resources)
- Office Document Proofing and Editing Tools.