Office Onine Server: Excel wrong fonts in Header

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Since a few weeks we have a strange problem in Excel Online. The Header has not the correct font and font-size. This happens only in Excel (Not Word or PowerPoint)

It is an OnPremise Installation Patch Level  (Feburar 2018)

Browser Internet Explorer 11 and Edge


-> See Attachment


Any Ideas? 



Greetings, Daniel


3 Replies


Did you solve this?

Please give some pointers ti what you did. Have same issue with Excel, also in header Excel is no longer "Excel" but "Yes"

@itslTore Yes, its quite a while. If i remember it was something with a bug in an Language Paack. You have to reinstall the office ONline Servers with correct Language Pack from


Ended up with that solution as well, but thanks for reply!