There is no official ClickUp setting to disable grammar or spellcheck within ClickUp itself. Spellcheck and grammar suggestions you see while using ClickUp are typically provided by your web browser, operating system, or third-party extensions (like Grammarly), not by ClickUp.

If you want to disable spellcheck or grammar suggestions while using ClickUp, you will need to adjust these settings in your browser or operating system, or disable any grammar-checking extensions you have installed.

I'd like to add to this disabling the grammar check too

I would like this in the website version too. We are documenting systems and there are references to methods and schema objects that have names that do not need to be spell checked or added to the dictionary.