Update all languages option lists and load language files

Language option list: EN, AF, ZU, XH, TN, ST

Support translations on: 
- [x] Public line registration and navigation
- [x] Opt out line: 
- [ ]  Service rating line

No initial translation on:
- [x] Clinic Registration
- [x] CHW line
- [x] FAQs on Public line
- [x] SMS Inbound