Click the Office button. Click Excel Options.
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Click Proofing. Click Custom Dictionaries.
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Select the check box next to CUSTOM.DIC (Default).
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Click the Dictionary language list arrow.
Select a language for a dictionary.
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Click Edit Word List to add, delete, or edit words.
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Click Change Default to select a new default dictionary. Click New to create a new dictionary. Click Add to insert an existing dictionary. Click Remove to delete a dictionary. Click OK to close the Custom Dictionaries dialog box.
