Challenge: VoxPopuli provides 400K hours of unlabeled speech data in 23 languages . large amounts of multilingual audio data are needed to achieve similar progress for multilingual ASR and ST.
Approach: They propose a large-scale multilingual corpus that provides 400K hours of unlabeled speech data in 23 languages.
Outcome: The proposed corpus provides 400K hours of unlabeled speech data in 23 languages and 1.8K hours transcribed speeches in 15 languages and their aligned oral interpretations into 15 target languages totaling 17.3K hours.

Similar Papers

VoxpopuliTTS: a large-scale multilingual TTS corpus for zero-shot speech generation (2025.coling-main)

Copied to clipboard

Challenge: Existing multilingual TTS datasets are limited in speech generation fields due to lack of quality data.
Approach: They propose to use 30,000 hours of high-quality speech data across 3 languages . they filter out low-quality text-text pairs and concatenate short transcripts .
Outcome: The proposed dataset comprises 30,000 hours of high-quality speech data, across 3 languages with multiple speakers and styles, suitable for various speech tasks such as TTS and ASR.
SpeechMatrix: A Large-Scale Mined Corpus of Multilingual Speech-to-Speech Translations (2023.acl-long)

Copied to clipboard

Challenge: SpeechMatrix is a large-scale multilingual corpus of speech-to-speech translations mined from real speech of European Parliament recordings.
Approach: They present a large-scale multilingual corpus of speech-to-speech translations mined from real speech of European Parliament recordings.
Outcome: The proposed model can train bilingual models on 136 language pairs with 418 thousand hours of speech.
Common Voice: A Massively-Multilingual Speech Corpus (2020.lrec-1)

Copied to clipboard

Challenge: Common Voice is a massively-multilingual collection of transcribed speech intended for speech technology research and development.
Approach: They propose to use Mozilla’s DeepSpeech Speech-to-Text toolkit to perform multilingual automatic speech recognition experiments.
Outcome: The proposed corpus is the largest in the public domain for speech recognition, both in terms of hours and languages.
A Corpus for Large-Scale Phonetic Typology (2020.acl-main)

Copied to clipboard

Challenge: Existing multilingual speech corpora have limited data in many languages . existing corpus is limited to a small number of languages with available data .
Approach: They propose a large-scale phonetic typology corpus with phoneme-level labels and phoneme alignments in 690 readings spanning 635 languages.
Outcome: The proposed corpus covers 635 languages and includes acoustic-phonetic measures of vowels and sibilants.
Glot500: Scaling Multilingual Corpora and Language Models to 500 Languages (2023.acl-long)

Copied to clipboard

Challenge: Lack of LLMs supporting low-resource languages is a serious impediment to bringing NLP to all of the world.
Approach: They create a model that scales LLMs horizontally and a corpus that covers 511 low-resource languages.
Outcome: The proposed model improves on five diverse tasks across low- and high-resource languages.
GigaSpeech 2: An Evolving, Large-Scale and Multi-domain ASR Corpus for Low-Resource Languages with Automated Crawling, Transcription and Refinement (2025.acl-long)

Copied to clipboard

Challenge: GigaSpeech 2 is a large-scale, multi-domain, multilingual speech recognition corpus for low-resource languages.
Approach: They propose a large-scale, multi-domain, multilingual speech recognition corpus for low-resource languages and an automated pipeline for data crawling, transcription, and label refinement.
Outcome: The proposed corpus reduces the word error rate for Thai, Indonesian, and Vietnamese on a realistic YouTube test set by 25% to 40% compared to Whisper large-v3.
From Tens of Hours to Tens of Thousands: Scaling Back-Translation for Speech Recognition (2025.emnlp-main)

Copied to clipboard

Challenge: Recent advances in Automatic Speech Recognition (ASR) have been fueled by massive speech corpora, but extending coverage to diverse languages with limited resources remains a formidable challenge.
Approach: They propose a pipeline that converts large-scale text corpora into synthetic speech using off-the-shelf text-to-speech (TTS) models.
Outcome: The proposed pipeline generates 500,000 hours of synthetic speech in ten languages and achieves transcription error reductions of over 30%.
Language Lives in Sparse Dimensions: Toward Interpretable and Efficient Multilingual Control for Large Language Models (2026.eacl-long)

Copied to clipboard

Challenge: Prior studies show that large language models map multilingual content into English-aligned representations at intermediate layers before projecting them back into target-language token spaces in the later layers.
Approach: They propose a method to identify and manipulate dimensions that are sparse and sparsity-based . they propose to use as few as 50 sentences of either parallel or monolingual data to manipulate these dimensions .
Outcome: Experiments on a multilingual generation control task show the interpretability of these dimensions.
MaSS: A Large and Clean Multilingual Corpus of Sentence-aligned Spoken Utterances Extracted from the Bible (2020.lrec-1)

Copied to clipboard

Challenge: The Bible is the same for all the languages, thus constituting a multilingual and comparable 2 spoken corpus, is not exploited to date.
Approach: They propose to add multilingual links between small speech segments in different languages . they use a large dataset of 8,130 parallel spoken utterances across 8 languages - maSS .
Outcome: The proposed model can build automatic speech recognition models for 700 languages.
From Unaligned to Aligned: Scaling Multilingual LLMs with Multi-Way Parallel Corpora (2025.emnlp-main)

Copied to clipboard

Challenge: Experiments show that models trained on multi-way parallel data outperform those trained on unaligned data.
Approach: They propose a large-scale, high-quality multi-way parallel corpus based on TED Talks that spans 113 languages with up to 50 languages aligned in parallel.
Outcome: The proposed model outperforms models trained on unaligned multilingual data on six multilingual benchmarks.

What is GenGO?

GenGO is an NLP powered publication search system. It currenctly indexes 30k+ papers from ACL Anthology, and implements multi-aspect summarization, semantic search, and more!

Information

About
Limitations