I just tried to replace the bundled US English dictionary with the British English one by replacing the DIC and AFF files with those from OpenOffice 3.2.
They appear to have changed the file format and the new dictionaries no longer work properly with Visual Assist (10.5.1738), even simple words like 'the' get underlined.
The old format had lists of word/letters, the new has word/numbers. I have found an old format dictionary but you still link to the OO site which gives new format downloads.
Am I making a mistake or has the format really changed?
How do you download the dictionary? On the linked page (http://lingucomponent.openoffice.org/) I clicked Download Dictionaries, then Dictionaries sorted by language and finally # 17 English (AU,CA,GB,NZ,US,ZA) and got here:
What I had done was follow the extensions link, there was no British English version but a note saying that it was delivered as part of the default OO install.
I searched the local installation and found en_GB files here: