SpellingDictionaries
SpellingDictionaries is a global option that specifies settings for spell checking.
This option controls which dictionaries are used for spell checking in notebooks and text processing.
Examples
CurrentValue[$FrontEnd, SpellingDictionaries]SetOptions[$FrontEnd, SpellingDictionaries -> {"English"}]Options[$FrontEnd, SpellingDictionaries]*See the official Wolfram Language Reference for more details.