Lang parameter in Closed Caption API document : why "jp-JP" for Japanese?

In examples of lang parameter (on closed caption API page), Japanese is shown as ‘jp-JP’.

Integrating a third-party closed captioning service – Zoom Help Center

But I found in IANA registry:

Type: language
Subtag: ja
Description: Japanese
Added: 2005-10-16
Suppress-Script: Jpan

Why it is ‘jp-JP’, not ‘ja-JP’ ?

no error.

Which App Type (OAuth / Chatbot / JWT / Webhook)?
Closed Caption API

Which Endpoint/s?

How To Reproduce (If applicable)
(Question on document, no execution)

Screenshots (If applicable)
(Question on document, no screenshots)

Additional context

Hey @sakashita,

Our support team would be able to best answer your question since they wrote that document! :slight_smile:

Please reach out to


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