How to test default-action() in IDE and common misunderstanding

Github example: https://github.com/MinChengVivLabs/defaultAction

how to test in IDE: 

In simulator, set target to en-US, and use one of the seven dispatch phrase in https://bixbydevelopers.com/dev/docs/reference/ref-topics/meta-commands.en-us

• "speak to %dispatch-name%"
• "talk to %dispatch-name%”
• "start %dispatch-name%"
• "load %dispatch-name%"
• "ask %dispatch-name%"
• "talk with %dispatch-name%”
• "use %dispatch-name%"

In the Github example, try "start test a" in the simulator to trigger the default action.

1. With target en-US, only default-action can get the number 74, all other utterance get a text output. 
2. With target en-GB, default-action is not triggered because it is not supported. 

#1 misunderstanding: 

default-action does not mean it is the default action when no training examples fit. 

It is the action that triggered ONLY by these dispatch phrase (without any NL utterance)

• "speak to %dispatch-name%"
• "talk to %dispatch-name%”
• "start %dispatch-name%"
• "load %dispatch-name%"
• "ask %dispatch-name%"
• "talk with %dispatch-name%”
• "use %dispatch-name%"

#2 misunderstning: 

default-action(ActionOne) ONLY applies to en-US, not other targets, not even en-GB.