If you upgrade to the latest version of JDT-Spelling, you can disable the entire plugin in the settings
Window -> Preferences -> Java -> JDT Spelling
Or maybe even better if this is not a function that you just want to remove the JDT-Spelling plugin from your eclipse installation.
Spelling support Eclipse is another service (and the internal one is so complicated to expand), so disabling it does not affect JDT Spelling. If you just turn off the tokens, it will still do everything that works to validate your Java names, but you won’t get any benefit from it.
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