All spell checking functionality is available from the Menu, item "spell checking".
You can enter a filename for the dictionary in the Dict Page of the settings notebook. If you don't enter a directory, the spell checking file has to be located at the same directory where WSedit.exe resides.
If you want to create a dictionary by yourself, you need to have existing Wordstar or ASCII files which are already spell-checked or where you can be sure that there are no incorrect words: Load the file into WSedit and choose "spell checking - absorb current file to dictionary".
If you have received another WSedit dictionary file from a friend or from the Internet, you can merge this file with "your" dictionary file by using "import external directory".
The principle of the WSedit dictionary is quite simple: If a word has to be absorbed, the endings
(english) es 's s ions ion ings ing
(german) es e 's s en em n
are cutted and the first character is converted to lower-case. Then it is compared to the contents of the dictionary. If no similar entry is found, it is placed into the dictionary.
The dictionary file is a normal ASCII file in IBM codepage.
The words are sorted by an internal sort algorithm,
not by the alphabet. You can add manually words at any position.