Hi,
I still have the same issue. Even changing the path doesn’t help. Translation only works when I do “ionic lab” on the console or start the app in the iOS simulator.
When I directly deploy to an iPhone or use ionic view it does’t work. 
$ ionic info
Your system information:
Cordova CLI: 6.5.0
Ionic Framework Version: 3.0.1
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.3.0
ios-deploy version: 1.9.1
ios-sim version: 5.0.13
OS: macOS Sierra
Node Version: v7.7.4
Xcode version: Xcode 8.3 Build version 8E162