I wanted to add some words to the Catalan dictionary but there's no *.MOR file associated with it either in WP 18 or 20. That explains why so many words in that language are redlined. Further, there's an annoying bug the spell checker redlines Catalan words already found in the dictionary!
Would you like me to send you the WP 20 UWL file so you can compare it to the main Catalan 18/20 dictionaries?
Offhand, I don't remember the words but I had to add a lot of words that the dictionary had but redlined them as wrong.
If you could provide a few Catalan words examples for us that would be great.