One addition with regard to PDF-XChange Viewer's OCR function:

The OCR functionality supports a base language set of English, French,
German and Spanish. Additional language extension packages are available **
*here.* ( https://www.tracker-software.com/pdf-xchange-viewer-ocr )

I once had a client using it on Swedish texts, which is one of the optional
languages available.  The language extension packages are also free.
--

Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041

*If you think that you can think about a thing, inextricably attached to
something else, without thinking of the thing it is attached to, then you
have a legal mind.*

~ Thomas Reed Powell