Chapters do not support multiple languages

[anthonypwinning]

VideoJS happily supports having captions in multiple languages:

<track kind="captions" src="//example.com/path/to/captions_en.vtt" srclang="en" label="English" default>
<track kind="captions" src="//example.com/path/to/captions_fr.vtt" srclang="fr" label="French">

However, if you try to do something similar with chapters, it simply does not work.

<track kind="chapters" src="//example.com/path/to/chapters_en.vtt" srclang="en" label="English" default>
<track kind="chapters" src="//example.com/path/to/chapters_fr.vtt" srclang="fr" label="French">

Chapters only work with a single chapter track. Since subtitles work with multiple languages, I believe chapters should also offer multi-lingual support.

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