Theme language cannot be changed in special cases

Hi
I use free version of DiBusiness theme.
I would like to use Hungarian language. I cannot find in header how to change the “Call” text to Hungarian.

Also in case of shop:
http://www.eskuvoajandek.hu/termek/exclusive-fa-pendrive-diszdobozzal-masolat/
here I would like to change the texts: “Range” and “Discounts” to Hungarian. How can I do it?

What can I do now? If I buy the pro version of this theme would it help?

tks
Rita

The page I need help with: [log in to see the link]