Microsoft Office, the software, is a bit like The Office, the TV show: there’s a British version and an American version (actually, there’s a French, German, Israeli and Chilean version, too). All jokes aside, if you ever find yourself writing for a U.K. audience but proofing using the default U.S. Word 2010 dictionary, you’re going to get far more red squiggly lines than you deserve. Or, let’s say you’re writing a report in AmEng, but you’re quoting a paper published in the U.K. Again, you’re going to get erroneous spellcheck hits. Here’s how to fix that on a document-by-document basis.
Create a New Word document, or open an existing document with AmEng/BrEng text.
Select the text for which you’d like to change the proofing language. If you want to change the entire document, press CTRL – A to select all.
From the Review ribbon, Click Language > Set Proofing Language…
Choose English (U.K.) or English (U.S.) and Click OK. Obviously, you can choose any other language here as well, including English (Canada) and other versions of English.
Repeat this for each section of your Word document that uses a different language. If you want to change all documents to the selected language, Click Set as Default.
That should do the trick.
For a more in-depth guide on setting up multiple dictionaries in Office 2010, check out this earlier tutorial by grooveDexter: How to Add Multiple Languages to Office 2010.