Effective from WebSpellChecker version 5.28.4.0 onwards, the usage of the following symbols is prohibited when adding words to the Custom User Dictionary through the WProofreader UI (Dictionary tab):

• spaces;
• a full stop (dot) at the beginning or end of a word;
• symbols: ,"^$*+?=!:÷`\|/()[]{}><@%&#;_~
• symbols: u061F, u060C, u061B;
• symbols in ranges: u0001-u001F, u0080-u00B6, u00B8-u00BF, u2000-u200A, u200C-u2018, u201A-u266F, u2E00-u2E7F.

Kindly refrain from including any of these symbols in the words added to the Custom User Dictionary.