What languages does Google Cloud Speech Automatic Punctuation Support?

I have been playing around with Cloud Speech API and noticed that it returns punctuation for English but not for Japanese when enableAutomaticPunctuation is set to true.

Does anybody know What languages does Google Cloud Speech Automatic Punctuation Support?

Solution

Speech-to-Text can provide punctuation in audio transcription text for 'en-US' language only.

EDIT MAY 2020: Now, Speech-To-Text supports more languages

How to implement speech recognition with the Google Cloud Speech-to-Text API using Node.js?
How to send an HTTP POST request to Google Cloud Speech To Text using plain Javascript
Guidance Needed: Voice Activity Detection and Timeout Handling with Cloud Speech-to-Text API C++ Client Library
How to use the GC Text to Speech API - Studio Voice
Calling Google Cloud Speech to Text API regional recognizers, using Python Client library, showing error 400 and 404
Google Cloud Speech - returns empty transcription, despite accurate payload
Google Speech recognize stream, first response has a big delay
Speech to Text: Google API Error 400 Sync input too long. For audio longer than 1 min use LongRunningRecognize with a 'uri' parameter
Multilanguage Google TTS sentence
Google Cloud Storage is giving me Authorization code 401 Invalid Credentials when trying to connect
Why is the speech REST API response different from the go SDK API response?
Re-encoding audio file to linear16 for google cloud speech api fails with '[Errno 30] Read-only file system'
Speech to text audiofile limit request
Speech-to-Text Phrase Exceeds Character Limit
Sending audio data generated by python-sounddevice.RawInputStream to Google Cloud Speech-to-Text for asynchronous recognition
How do I stream live audio from the browser to Google Cloud Speech via socket.io?
Empty response using Speech-to-Text API on WAV file
Generate AccessToken for GCP Speech to Text on server for use in Android/iOS
Google Speech To Text API: Get word confidences for the interim results in real time
Make a website converting text to audio [Google Cloud Text to Speech API]
Speech to text RecognitionAudio fromBytes always returns blank result
Google cloud speech to text not giving output for OGG & MP3 files
Google cloud speech API response : Parsing iOS
Google Cloud Platform speech to text - customize transcribed text
Google Speech to Text Error: "Invalid recognition 'config': bad encoding.." for an MP3 file
Google Cloud Video Intelligence Speech Transcription
gcp cloud speech java client throwing Exception: Task was cancelled
How do serialize and deserialize a `longRunningRecognize` operation to get its result later?
Google cloud speech to text - How to get numbers in digit
Flutter: Google Speech-To-Text API always returns null