How to fix dictionary error in Microsoft Word 2011 Mac OS?

Question

Microsoft Office

An error occurs with dictionaries when working with Word documents. Namely, the system finds spelling errors in words where there are no errors. In practice, it looks like this: When you open the document for the first time, everything works correctly. As soon as I change the language and type a couple of words in Latin and switch back, it starts to underline errors in new words that I print after that. Again I change the language to Latin, type, switch back, erase what I typed in Latin, then write in Cyrillic and there are no more errors. There is a feeling that the problem is in switching dictionaries.
How to fix?
OS: Mac OS
Software: Microsoft Word 2011 v14.6.1.