raidboss: fix bug in translatable instructions
raidboss: fix bug in translatable instructions

Closes #1734, which is using display language instead, but timelines
use a different fallback order for languages.  This patch is
an alternative approach to that.

quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot