How to add new words to the dictionary?

[siddjain]

Hello

I tried this spell checker. Is there any way to do something like aspell check on the document where one can correct mistakes and add new words to the dictionary, tell it to ignore words etc.? It seems like a read-only spell checker where it checks each word against dictionary and underlines it with a red swiggy if the word does not exist in the dictionary e.g.,

Can it do anything more than that or is that the only feature of this spell checker?

[siddjain]

on right-clicking the word I saw this menu

but when I click on Ignore All nothing happens