Hi... see below a reply from the techies. Hope this info helps.
"The 4th option was added during the 2014 soccer WC to accommodate English, Portuguese, Zulu and Tswana. The options have remained since than, and as/when 4 languages is needed, it will be available from the Head End side. We have no control on what goes on to the various languages, and the options available to the viewers will be “English-Original”, “Lang 2 of 4”, “Lang 3 of 4” and “Lang 4 of 4”. SS, using on-air info on where to find the viewers favourite language, inserts it accordingly.
If only “English” is available, SS populate the other 3 languages with “English” as well, and sometimes the 4th language carries effects.
With regards to recording, the SD PVR has a limitation on the audio tracks which can be recorded."