Can anyone point me in the right direction for changing the dictionary of netspell?

 

I've added <globalization culture="en-GB"/> to my web.config but netspell still thinks the UK spellings are errors and continues to think the US spellings are correct.

 

ie Colour is detected as a mistake, color get the all clear.

 

I notice there is also a dictionary en-UK but setting that as my culture in web.config prevents the compiler from completing and highlights the culture as non exisitant