Here some sites which seem to provide automatic translations of audio files

> AI Dubbing

https://elevenlabs.io/dubbing
https://speechify.com/dubbing/
https://synthesys.io/ai-dubbing/
https://www.speechlab.ai/
https://dubsync.ai/
> Free AI Audio Translator (it's unclear if it generates a translated audio as output)

https://maestra.ai/tools/audio-translator
https://maestra.ai/tools/audio-translator/mp3-translator
> Only audio to text transcription it seems

https://www.veed.io/tools/audio-translator
https://www.veed.io/tools/video-translator/translate-mp3
https://podcastle.ai/tools/audio-translator
https://www.kapwing.com/tools/translate/audio
https://wavel.ai/studio/free-online-audio-translator
https://flixier.com/tools/audio-translator
https://www.notta.ai/en/translate-audio
https://alrite.io/ai/convert-mp3-to-text-with-ai/

Some in the original thread suggested to only add subtitles while keeping the original audio, that could be even easier to do than to generate an artificial voice translation.