The Messages & languages settings hold the workspace defaults for what consumers read on each channel. Each campaign can override these in its Channels step, so this is your baseline, not a hard rule.
PER CHANNEL, PER LANGUAGE
Maintain separate scripts for the USSD menu, SMS reply and WhatsApp flow, each translated across the languages you support — English, Hausa, Yoruba, Igbo and Pidgin, with more addable.
VARIABLES
Personalise messages with variables that fill in automatically: {reward}, {balance}, {name} and {draw_date}. For example: "Code accepted. ${reward} airtime sent. Bal: {balance} pts."
CHANNEL LIMITS
Mind the constraints when writing: USSD menus have roughly a 182-character limit and should keep lines short, and one SMS segment is about 160 characters. The editor reminds you of the active limit as you type.