When writing Email in ACE Interact, Chat in ACE Interact and Sms in ACE Interactyou might have access to spell check functionality. As the spell check in ACE Interact is provided by your browser it may be available via the right click menu. I.e. performance and selection of languages varies depending on your computer's operating system and choice of web browser.
You can add words to the dictionary, by right click menu. However, added words will only be seen using the currently used workstation, i.e. they are not stored in any central glossary.