RE: An unknown error has occurred in Outlook.

Hi Pavol,

Glad I was able to fix your earlier issue.

Please find the details in the below post to change the Language to Slovak in your Office for MAC applications.

guide2office.com/.../faq-how-to-i-change-the-default-language-in-word-for-mac-word-2011

www.dummies.com/.../word-2011-for-mac-changing-the-dictionary-to-a-dif.html

support.office.com/.../Check-spelling-and-grammar-in-a-different-language-b872cb8a-7568-4512-9c8e-1da7ed5176ec

I hope the above articles will help you change the language.

Let me know how it goes :)

Kindest Regards!

Dileepa