Multilingual LibriSpeech (MLS)

by Meta AI / Facebook AI Research

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44.5k hours of read multilingual audiobook speech across 8 European languages.

HuggingFace, OpenSLR  ·  free

TL;DR

Best for multilingual ASR training; cross-language transfer baselines beyond English. Pricing: free.

Category
Open source
Pricing
free
Platforms
HuggingFace, OpenSLR

What it is

Multilingual LibriSpeech (MLS) extends LibriSpeech to 8 European languages from LibriVox: 44.5k hours total. English dominates (44.7k); other languages range 100–2000h. License: CC BY 4.0.

Best for: Multilingual ASR training; cross-language transfer baselines beyond English.
Watch out for: CC BY 4.0 · read audiobook (LibriVox) bias · 8 languages only (en, de, nl, fr, es, it, pt, pl) · public-domain books only. Cite: Pratap et al., Interspeech 2020.

Install / use

from datasets import load_dataset; ds = load_dataset('facebook/multilingual_librispeech', 'german')

What people actually do with Multilingual LibriSpeech (MLS)-style transcription

The tool is the means. These are the jobs — each one priced at published rates, each one wired up on its own page.

Wire it into Amazon S3n8nMake.comGoogle DriveZapierSlack

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeNo
Languages supported8
HIPAA eligibleNo

Multilingual LibriSpeech (MLS) vs Whipscribe

FeatureMultilingual LibriSpeech (MLS)Whipscribe
CategoryOpen sourceTranscription APIs
Pricingfree$6–$24 one-time packs (credits never expire) · first 20 minutes free
Speaker identificationNoNamed in the summary, key quotes and chapters
Word timestampsNoYes
StreamingNoNo
Languages899
PlatformsHuggingFace, OpenSLRWeb, API, MCP

Alternatives to Multilingual LibriSpeech (MLS)

Frequently asked about Multilingual LibriSpeech (MLS)

Is Multilingual LibriSpeech (MLS) free?

Yes. Multilingual LibriSpeech (MLS) is free and open source.

Does Multilingual LibriSpeech (MLS) work on Mac, Windows and Linux?

Multilingual LibriSpeech (MLS) runs on HuggingFace and OpenSLR. It is not listed for other platforms; check the vendor for anything beyond HuggingFace and OpenSLR.

How do I install Multilingual LibriSpeech (MLS)?

Download the installer for your platform from the vendor. No terminal needed.

How many languages does Multilingual LibriSpeech (MLS) support?

Multilingual LibriSpeech (MLS) lists 8 languages.

Does Multilingual LibriSpeech (MLS) identify different speakers?

No. Multilingual LibriSpeech (MLS) does not label speakers; a conversation comes back as one continuous text. If you need speaker labels, that is a separate tool or a different service.

Does Multilingual LibriSpeech (MLS) give word-level timestamps?

No — Multilingual LibriSpeech (MLS) produces segment or sentence timing only, so subtitle cues can land mid-word.

Can Multilingual LibriSpeech (MLS) transcribe live audio?

No — Multilingual LibriSpeech (MLS) works on finished files, not a live stream.

Is Multilingual LibriSpeech (MLS) HIPAA compliant?

Multilingual LibriSpeech (MLS) does not claim HIPAA compliance. For PHI, run it on infrastructure you control or choose a service that will sign a BAA.

What are the limitations of Multilingual LibriSpeech (MLS)?

CC BY 4.0 · read audiobook (LibriVox) bias · 8 languages only (en, de, nl, fr, es, it, pt, pl) · public-domain books only. Cite: Pratap et al., Interspeech 2020.

Who is Multilingual LibriSpeech (MLS) best for?

Multilingual ASR training; cross-language transfer baselines beyond English.

Does Multilingual LibriSpeech (MLS) run offline?

Multilingual LibriSpeech (MLS) runs on your own machine — it is open source, so nothing leaves the computer unless you configure it to.

Can I use Multilingual LibriSpeech (MLS) in the browser?

No — Multilingual LibriSpeech (MLS) is a HuggingFace and OpenSLR application, not a web app. You install it rather than sign in to it.

Where is the Multilingual LibriSpeech (MLS) source code?

On GitHub at github.com/facebook/multilingual_librispeech. It is maintained by Meta AI / Facebook AI Research.

What kind of tool is Multilingual LibriSpeech (MLS)?

In this directory Multilingual LibriSpeech (MLS) is filed under dataset as a open-source tool.

What are the alternatives to Multilingual LibriSpeech (MLS)?

There is a side-by-side page at /tools/mls-alternatives comparing Multilingual LibriSpeech (MLS) with the closest tools in the same category on price, platform and features.

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