Unable to add or suppress words in UWL file

Merry Christmas.

I'm really put off because the WP 2021 (and older versions since at least Wp 15) Speller utilities don't allow add or suppress words in the UWL files It's really irritating and detracts from the program's utility. Frankly, the speller utility needs to open all the MOR, LEX and UWL files natively. 

I've already asked for this but the language I use don't have the MOR/LEX file other than French/English. So I suggest brushing off the WP 8 MOR/LEX files and updating them to worjk with WIn 10/11 32 and 64 bits