Dictionary Word Limit

Is there a dictionary word limit??
I’ve found lately that I can’t add new words to my dictionary using the plug-in in Google Docs

Also I would like to know if it’s possible to backup the Dictionary in the Chrome extension in case I need to reinstall a new version

There’s no limit in the code. How many words do you have in your dictionary? Are there maybe ones with strange special characters that might cause this issue?

As it’s just a list of words, you can go to Add-ons → LanguageTool → Options and copy the contents of the personal dictionary.