Spell Checking / Dictionary in Outlook

[alice]

Up until recently I have been able to use the add to dictionary button when
spell checking in my emails. However, quite suddenly, it stopped working and
is now greyed out. It is now doing to same thing in Word. Is there any way
to get this reversed?

Also, despite going through Tools, Options etc (in everything!) and
defaulting my dictionary to English (UK) it is constantly defaulting back to
US when I check spelling while writing emails. Is there any way to stop
this??

Thanks