Is it necessary to specify the language for best results?

[qo4on]

Does selecting a specific language such as --language en, --language es, --language ru and others instead of automatically selecting --language None affect the quality of transcription?

[ryanheise]

There should be no difference in quality assuming Whisper detects the correct language. But if it detects the wrong language, that will affect the transcription quality in the same way as if you had specified the wrong language with --language wrong_language....

[qo4on]

I noticed that if you specify wrong language --model turbo --language wrong_language, the quality of transcription decreases, also new lines are added in text files where they should not be. Did I get it right, is this how it should be?

[ryanheise]

Yes, specifying the wrong language is only going to produce confusing results.