Official documentation
Automatically detect language (Cloud Speech-to-Text documentation)
Google, Google Cloud Documentation, 2026
Read the originalRead on October 17, 2026
- What it is
- Google Cloud's guide to giving Speech-to-Text a list of possible languages. It sets the three-language limit, explains how one best-fit language is chosen for a request, and advises keeping the list short.
- How much weight it carries
- Official documentation for one cloud API, so it states the rules rather than measured accuracy. The page limits the feature to certain models and regions, which can change over time.
Facts taken from this source
- Google advises listing only the languages you need, because a shorter list makes it more likely that the service picks the correct language.
“The fewer language codes you specify, the higher the likelihood that Cloud Speech-to-Text successfully selects the correct one.” (Automatically detect language)
- When a request lists several languages, Google's service transcribes the audio using one best-fit language from that list.
“In a request with multiple languages, Cloud Speech-to-Text attempts to transcribe the audio using the best-fit language from the list of alternates you provided.” (Automatically detect language)
- Google's automatic language recognition accepts a list of up to three languages.
“You can list up to three languages for automatic language recognition.” (Automatically detect language)