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Code-switching speech refers to a means of expression by mixing two or more languages within a single utterance. Automatic Speech Recognition (ASR) with End-to-End (E2E) modeling for such speech can be a challenging task due to the lack of…

Audio and Speech Processing · Electrical Eng. & Systems 2023-03-21 Haibin Yu , Yuxuan Hu , Yao Qian , Ma Jin , Linquan Liu , Shujie Liu , Yu Shi , Yanmin Qian , Edward Lin , Michael Zeng

We focus on the problem of language modeling for code-switched language, in the context of automatic speech recognition (ASR). Language modeling for code-switched language is challenging for (at least) three reasons: (1) lack of available…

Computation and Language · Computer Science 2019-11-12 Hila Gonen , Yoav Goldberg

Code-switching automatic speech recognition (CS-ASR) presents unique challenges due to language confusion introduced by spontaneous intra-sentence switching and accent bias that blurs the phonetic boundaries. Although the constituent…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-18 Hexin Liu , Haoyang Zhang , Qiquan Zhang , Xiangyu Zhang , Dongyuan Shi , Eng Siong Chng , Haizhou Li

In this work, we seek to build effective code-switched (CS) automatic speech recognition systems (ASR) under the zero-shot setting where no transcribed CS speech data is available for training. Previously proposed frameworks which…

Computation and Language · Computer Science 2022-11-10 Brian Yan , Matthew Wiesner , Ondrej Klejch , Preethi Jyothi , Shinji Watanabe

Code-switching (CS), the alternation between two or more languages within a single conversation, presents significant challenges for automatic speech recognition (ASR) systems. Existing Mandarin-English code-switching datasets often suffer…

Computation and Language · Computer Science 2025-03-13 Jiaming Zhou , Yujie Guo , Shiwan Zhao , Haoqin Sun , Hui Wang , Jiabei He , Aobo Kong , Shiyao Wang , Xi Yang , Yequan Wang , Yonghua Lin , Yong Qin

A lack of code-switching data complicates the training of code-switching (CS) language models. We propose an approach to train such CS language models on monolingual data only. By constraining and normalizing the output projection matrix in…

Computation and Language · Computer Science 2020-05-22 Shun-Po Chuang , Tzu-Wei Sung , Hung-Yi Lee

Training multilingual automatic speech recognition (ASR) systems is challenging because acoustic and lexical information is typically language specific. Training multilingual system for Indic languages is even more tougher due to lack of…

Computation and Language · Computer Science 2022-06-14 Harveen Singh Chadha , Priyanshi Shah , Ankur Dhuriya , Neeraj Chhimwal , Anirudh Gupta , Vivek Raghavan

Code-switching (CS) is the alternating use of two or more languages within a conversation or utterance, often influenced by social context and speaker identity. This linguistic phenomenon poses challenges for Automatic Speech Recognition…

Computation and Language · Computer Science 2025-06-03 Peng Xie , Xingyuan Liu , Tsz Wai Chan , Yequan Bie , Yangqiu Song , Yang Wang , Hao Chen , Kani Chen

Recently, there has been significant progress made in Automatic Speech Recognition (ASR) of code-switched speech, leading to gains in accuracy on code-switched datasets in many language pairs. Code-switched speech co-occurs with monolingual…

Audio and Speech Processing · Electrical Eng. & Systems 2020-06-02 Sanket Shah , Basil Abraham , Gurunath Reddy M , Sunayana Sitaram , Vikas Joshi

This paper reports on the semi-supervised development of acoustic and language models for under-resourced, code-switched speech in five South African languages. Two approaches are considered. The first constructs four separate bilingual…

Audio and Speech Processing · Electrical Eng. & Systems 2020-03-09 Astik Biswas , Emre Yılmaz , Febe de Wet , Ewald van der Westhuizen , Thomas Niesler

We explore cross-lingual multi-speaker speech synthesis and cross-lingual voice conversion applied to data augmentation for automatic speech recognition (ASR) systems in low/medium-resource scenarios. Through extensive experiments, we show…

Code-switching (CS) poses a significant challenge for Large Language Models (LLMs), yet its comprehensibility remains underexplored in LLMs. We introduce CS-Sum, to evaluate the comprehensibility of CS by the LLMs through CS dialogue to…

Computation and Language · Computer Science 2025-05-21 Sathya Krishnan Suresh , Tanmay Surana , Lim Zhi Hao , Eng Siong Chng

In this paper, we present our overall efforts to improve the performance of a code-switching speech recognition system using semi-supervised training methods from lexicon learning to acoustic modeling, on the South East Asian…

Computation and Language · Computer Science 2018-06-19 Pengcheng Guo , Haihua Xu , Lei Xie , Eng Siong Chng

Code-switching (CS) refers to the switching of languages within a speech signal and results in language confusion for automatic speech recognition (ASR). To address language confusion, we propose a language alignment loss (LAL) that aligns…

Audio and Speech Processing · Electrical Eng. & Systems 2025-11-04 Hexin Liu , Xiangyu Zhang , Haoyang Zhang , Leibny Paola Garcia , Andy W. H. Khong , Eng Siong Chng , Shinji Watanabe

Code-switching (CS) refers to a linguistic phenomenon where a speaker uses different languages in an utterance or between alternating utterances. In this work, we study end-to-end (E2E) approaches to the Mandarin-English code-switching…

Computation and Language · Computer Science 2019-07-12 Zhiping Zeng , Yerbolat Khassanov , Van Tung Pham , Haihua Xu , Eng Siong Chng , Haizhou Li

Code-switching (CS) is common in daily conversations where more than one language is used within a sentence. The difficulties of CS speech recognition lie in alternating languages and the lack of transcribed data. Therefore, this paper uses…

Computation and Language · Computer Science 2021-10-08 Liang-Hsuan Tseng , Yu-Kuan Fu , Heng-Jui Chang , Hung-yi Lee

Code-switching, the act of alternating between languages, emerged as a prevalent global phenomenon that needs to be addressed for building user-friendly language technologies. A main bottleneck in this pursuit is data scarcity, motivating…

Computation and Language · Computer Science 2025-04-01 Injy Hamed , Ngoc Thang Vu , Nizar Habash

In the FAME! Project, a code-switching (CS) automatic speech recognition (ASR) system for Frisian-Dutch speech is developed that can accurately transcribe the local broadcaster's bilingual archives with CS speech. This archive contains…

Computation and Language · Computer Science 2019-07-01 Emre Yılmaz , Samuel Cohen , Xianghu Yue , David van Leeuwen , Haizhou Li

Modeling voices for multiple speakers and multiple languages in one text-to-speech system has been a challenge for a long time. This paper presents an extension on Tacotron2 to achieve bilingual multispeaker speech synthesis when there are…

Audio and Speech Processing · Electrical Eng. & Systems 2020-05-22 Zexin Cai , Yaogen Yang , Ming Li

Code-switching automatic speech recognition becomes one of the most challenging and the most valuable scenarios of automatic speech recognition, due to the code-switching phenomenon between multilingual language and the frequent occurrence…

Computation and Language · Computer Science 2022-10-14 Shuhao Deng , Chengfei Li , Jinfeng Bai , Qingqing Zhang , Wei-Qiang Zhang , Runyan Yang , Gaofeng Cheng , Pengyuan Zhang , Yonghong Yan