The Typst web app’s personal spellcheck dictionary is too small and quickly fills up for technical documents with many acronyms and domain terms. Please increase the limit (or make it configurable) and add a way to view/remove entries, or alternatively support using the browser’s own dictionary so users aren’t blocked by an app-specific cap.
The limit is there due to technical reasons on how the feature was implemented in the past, see issue #338.
The entries can be edited/removed, open a project, open the settings (gear icon) then select “Personal Dictionary”.