Central Institute of Indian Languages
Punjabi Sentence Aligned Speech Corpus
52:24:51 hours | 34:8 GB | 31,338 Audio Segments | 449 SpeakersThe LDC-IL Punjabi Sentence Aligned Speech dataset comprises audio files in wav format, accompanied by a corresponding textual layer containing phonetically normalized and orthographically normalized annotations in Gurmukhi script. This dataset spans a duration of 52:24:51 (hh:mm:ss) , consisting of read speech with continuous text, representative sentences, and date formats. A comprehensive explanation of dataset can be found in the Punjabi Sentence Aligned Speech Documentation.For any research-based citations, please use the following citations:Dr. Shalinder Singh, Rajesha N., Manasa G., Stephen Fernandes, Nithin S., Roopashri M. R., Dr. Narayan Kumar Choudhary, Prof. Shailendra Mohan. 2025. Punjabi Sentence Aligned Speech Corpus. Central Institute of Indian Languages, Mysore. 978-93-48633-69-9.Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Purkhi Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Purkhi Words: 31,518 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Purkhi parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Purkhi section includes 31,518 words and 168,754 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Dr. Zargar Adil Ahmad, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. 2026. Purkhi Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore.978-81-69175-52-42. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0..
Rai Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Rai Words: 25,213| 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Rai parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Rai section includes 25,213 words and 173937 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Umesh Chamling Rai, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. 2026. Rai Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-71-5.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Rajasthani/Marwari Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Rajasthani/Marwari Words: 31,096 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Rajasthani/Marwari parallel text corpus connected with Hindi and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Rajasthani/Marwari section includes 31,096 words and 1,43,551 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Ankita Tiwari, Dr. Rejitha K. S., Dr. Narayan Kumar Choudhary, Prof. Shailendra Mohan. 2026. Rajasthani/Marwari Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-62-3.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Reang Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Reang Words: 36337 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Reang parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Reang section includes 36337 words and 164934 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Amom Nandaraj Meetei, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. 2026. Reang Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore 978-81-69175-66-1.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Rengma Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Rengma Words: 33886 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Rengma parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Rengma section includes 33886 words and 170815 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Amom Nandaraj Meetei, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. 2026. Rengma Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore 978-81-69175-39-5.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Rongmei Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Rongmei Words: 37776 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Rongmei parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Rongmei section includes 37776 words and 200564 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Yumnam Premila Chanu, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. Rongmei Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-56-2.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Sadan/Sadri Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Sadan/Sadri Words: 31,676 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Sadan/Sadri parallel text corpus connected with Hindi and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Sadan/Sadri section includes 31,676 words and 1,44,910 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Ankita Tiwari, Dr. Rejitha K. S., Dr. Narayan Kumar Choudhary, Prof. Shailendra Mohan. 2026. Sadan/Sadri Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore.978-81-69175-28-9.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Sambalpuri Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Sambalpuri Words: 27,783 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Sambalpuri parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Sambalpuri section includes 27,783 words and 138,676 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Sonali Sutradhar, Dr. Rejitha K. S., Dr. Narayan Kumar Choudhary, Prof. Shailendra Mohan. 2026. Sambalpuri Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-58-6.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Sangtam Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | SangtamWords: 28716 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Sangtamparallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Sangtam section includes 28716 words and 173970 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Yumnam Premila Chanu, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. SangtamParallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-22-7.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Sanskrit Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | SanskritWords: 24,136 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Sanskritparallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Sanskrit section includes 24,136 words and 152626 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Chetan Baji, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. 2026. Sanskrit Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-47-0.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Santali Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Santali Words: 32,902 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Santali parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Santali section includes 32,902 words and 188,001 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Sonali Sutradhar, Dr. Rejitha K. S., Dr. Narayan Kumar Choudhary, Prof. Shailendra Mohan. 2026. Santali Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-93-7.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Santali Raw Speech Corpus
50:58:13 Hours | 15.08 GB | 60 Speakers | 11844 Audio SegmentsThe Santali Raw Speech Corpus speech data is recorded using the SDCP (Speech Data Collection Portal) mobile application developed by the Linguistic Data Consortium for Indian Languages (LDC-IL). This corpus consists of recordings of native Santali speakers from various parts of the state of Jharkhand. The corpus contains multiple audio recordings for each content category, with each recording featuring different material. Speakers from different age groups recorded spontaneous speech, including literary excerpts and sentences. The sentences were taken from the Parallel Corpus developed by LDC-IL.A minimum of 2,000 words of read speech is recorded from each speaker, which includes approximately 1,000 words from sentences (Parallel Corpus) and 1,000 words from literary texts. The data also includes spontaneous speech recordings based on various topics or questions related to day-to-day life from different domains.For any research-based citations, please use the following citations:1. Dharmenjay Hembram, Ankita Tiwari, Dr. Narayan Kumar Choudhary, Prof. Shailendra Mohan. 2026. Santali Raw Speech Corpus. Central Institute of Indian Languages, Mysore. 978-81-69175-04-3.2. Narayan Choudhary, Rajesha N., Manasa G. & L. Ramamoorthy. 2019. “LDC-IL Raw Speech Corpora: An Overview” in Linguistic Resources for AI/NLP in Indian Languages. Central Institute of Indian Languages, Mysore. pp. 160-174.3. Choudhary, N. 2021. LDC-IL: The Indian Repository of Resources for Language Technology. Language Resources & Evaluation. Springer, Vol. 55, Issue 1. doi: https://doi.org/10.1007/s10579-020-09523-3...
Saurashtra/Saurashtri Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 |Saurashtra/Saurashtri Words:22666| 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Saurashtra/Saurashtri parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Saurashtra/Saurashtri section includes 22666 words and 153600 characters. Overall, the corpus comprises 44,04,845 words (over 4.4 million tokens) and 2,33,74,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Dr. Kamaraj S, Dr. Rejitha K. S, Dr. Narayan Choudhary, Prof. Shailendra Mohan. 2026. Saurashtra/Saurashtri Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore. 978-81-69175-48-7.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...
Sema Parallel Text Corpus: Linguistic Features and Structures
Total Words: 4,404,845 | Sema Words: 30803 | 5,332 sentences/phrases in each mother tonguesIndia has 270 mother tongues as per 2011 census. Following the requirements of the NEP-2020, LDC-IL developed parallel corpus in Indian mother tongues. The Sema parallel text corpus connected with English and 146 mother tongues of India. It contains 5,332 sentences/phrases systematically structured based on 159 grammatical categories. The Sema section includes 30803 words and 167974 characters. Overall, the corpus comprises 4,404,845 words (over 4.4 million tokens) and 23,374,289 characters (approximately 23.3 million).The price indicated corresponds to a single language component. The total payment will be determined based on the number of language components requested by the seeker.For any research-based citations, please use the following citations:1. Amom Nandaraj Meetei, Dr. Rejitha K. S., Dr. Narayan Choudhary, Prof. Shailendra Mohan. 2026. Sema Parallel Text Corpus: Linguistic Features and Structures. Central Institute of Indian Languages, Mysore 978-81-69175-75-3.2. Rejitha K. S. and Narayan Kumar Choudhary. (ed.). 2025. LDC-IL Corpus Insights. Central Institute of Indian Languages, Mysore. 978-93-48633-33-0...