Update: The download location is no longer available. I have modified this blog entry to reflect that.
Are you a non-American? Want real spell checking for Windows Live Writer? I know I do! I was browsing the net today when I found this little gem from Graham Chastney’s blog. The instructions are easy, download a clx dictionary file (in this case, British), you only need the clx file, and put it into C:\Program Files\Windows Live\Writer\Dictionaries. Rename the original file (the American one) from ssceam2.clx to ssceam2_old.clx and rename your new dictionary file to ssceam2.clx. Then start Writer and you will have the British dictionary loaded.
I have put the dictionaries in my SkyDrive area for download and I have included the following languages (remember, you only need to download the clx files, although I have included the tlx files as well):
http://cid-fabdddc5cad93494.skydrive.live.com/browse.aspx/Dictionaries. These dictionaries have come from TextPad.
I should note that this is unsupported, so if you balls up your Writer installation by doing this, I take no responsibility, and neither will the Writer team if you contacted them.