Updated message flow

- [x] After User SMSs MMC. We reply with Welcome + Msg 1 + language choices at end. 
- [x] If user replies with language choice, user receives Msg 1 in their language choice immediately. 

For reference: Msg 1 is part of registration. Msg 2 - 21 are in the scheduler (which starts on Day 2 with Msg 2)

No longer include english in the lang list.