
Hi @Nick Marsden ,
Which language of Office are you using?
Different suffixes represent different language packs, you can remove the language you don't use from list.
About the language pack you can refer to this support article:
https://support.microsoft.com/en-us/office/language-accessory-pack-for-office-82ee1236-0f9a-45ee-9c72-05b026ee809f
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