1. Dart
2. dart:html
3. SpeechSynthesisVoice
4. lang property

SpeechSynthesisVoice class

1. Properties
2. defaultValue
3. lang
4. localService
5. name
6. voiceUri
7. hashCode
8. runtimeType
9. Methods
10. noSuchMethod
11. toString
12. Operators
13. operator ==