Change to Australian spell-check in Pages
Total Mac newbie here. I need to be able to change the language in a Pages document from American English to Australian English without changing it across all documents or across the computer. In other words, I need to set a document so that spell-check will highlight a word like "personalize" when, in Australian English, it should be "personalise." Is there an easy way to do that on a document-by-document basis?
As best I can tell, this computer has OS 10.12.6. Thanks so much!
MacBook Air, Mac OS X (10.1.x)