There you will find custom settings for spelling checks, like ignore words in uppercase, flag repeated words, etc. In some languages, the Grammar check feature is also available. But if you do not ...

By some estimates, the English language contains over a million unique words. This is perhaps overly generous, but even ...

Unprotect the worksheet. Enable Custom Dictionaries. 1] Check if the cell contains a formula It might be the case that the spell checker tool is not working in cells containing formulas.