While I’m on the topic of FeedDemon, Nick Bradbury posted a couple of days ago about how to localise the language of FeedDemon. It’s fully customisable using the language xml files in the [FeedDemon Install Folder]/Data/lang/ folder. So in view of that I put together a modification of the default American English language file that changes the spelling of words like ‘colour’ and ‘synchronised’ from the American to the Australian (or British) spelling.
If you want to use it grab it from here. If you’re viewing that page in FeedDemon it will install it automatically. If not, just copy the file to the folder above & restart FeedDemon.