Alex* has posted a piece of code that will solve my issue with Window Live Writer and spell checking.
The problem is that this is clearly working around a technical limitation in the software, as a non English speaker, I am obviously required to use Windows Live Writer Team Edition, which will (in the next version only, mind you) support English spell checking for non-English speakers. I am expecting the Cease & Desist to come at any moment, and Alex is currently expecting an attack from the Tean Ninja Lawyers teams.
Nice hack Alex, now off to prison with you.
* Sorry to pick on you, but that was too good an example not to use.