1. create config below into data/message_en.cfg

hello = "Hello"
shanghai = "ShangHai"

2. use tag in heist template

<i18n name="shanghai"></i18n>

see test at test/snap.hs*

• what is snaplet

• maybe multiple locale support at run time.
• build failed at Hakcage
  • because heist does not specify version of transformers, which will conflick with transformer of mtl
  • Upgrade heist would be fine.