How to understand Setting> Languages tap? - translate, language field on the user type

Questions
1
  1. How does works??
  2. For translation, I’ve learned we need to use Setting>Languages (not directly using text ) but HOW?
2

The language function that you are talking about will reflect the website javascript alerts. For example, if I use already exists an alert will popup. The language setting will reflect that.

3

Hello @song52114

Take a look