How to change language for spell check purposes on Mac OS X Leapord?

I want to know how to change language settings so that I can write in French and still have the spell checking feature wherever I go.How to change language for spell check purposes on Mac OS X Leapord?
System prefs %26gt;Personal%26gt;International%26gt;language



Newbies Guide to Leopard here

http://www.apple.com/findouthow/macosx/How to change language for spell check purposes on Mac OS X Leapord?
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Are you using Word : Mac ? If you are then under TOOLS you will find the language setting and you can change it to French and still have the spell check feature.