1) You may want to check below link about how to change application preferences on Nvivo for Mac:
You need to open Nvivo preferences then click Language tab and change the language.
2) In order to download the most up to date version of Nvivo's older versions you need to create an account on My Nvivo Portal. After you sign-in click Download Nvivo and choose download older versions.
Hope these help,
With kind regards,