LingoIITGN/COMI-LINGUA

Dataset Details

COMI-LINGUA (COde-MIxing and LINGuistic Insights on Natural Hinglish Usage and Annotation) is a high-quality Hindi-English code-mixed dataset, manually annotated by three annotators. It serves as a benchmark for multilingual NLP models by covering multiple foundational tasks.

COMI-LINGUA provides annotations for several key NLP tasks:

• Language Identification (LID): Token-wise classification of Hindi, English, and other linguistic units.
  Initial predictions were generated using the Microsoft LID tool, which annotators then reviewed and corrected.

  Example:
  sentence: प्रधानमंत्री  नरेन्द्र  मोदी  डिजिटल  इंडिया  मिशन  को  आगे  बढ़ाने  के  लिए  पिछले  सप्ताह  Google  के  CEO  सुंदर  पिचाई  से  मुलाकात  की  थी ।
  LID tags:   hi    hi   hi    en    en    en   hi  hi   hi  hi  hi   hi    hi     en   hi  en   hi   hi   hi   hi   hi  hi ot

• Matrix Language Identification (MLI): Sentence-level annotation of the dominant language.

  Example:
  sentence:"किसानों को अपनी फसल बेचने में दिक्कत न हो इसके लिये Electronic National Agriculture Market यानि ई-नाम योजना तेजी से काम हो रहा है।" Matrix Language: hi
  sentence:"India’s automation and design expert pool is vast, और ज़्यादातर Global companies के इंजीिनयिंरग center भी भारत में हैं।" Matrix Language: en

• Part-of-Speech (POS) Tagging: Syntactic categorization for linguistic analysis.
  Tags were pre-assigned using the CodeSwitch NLP library, which annotators then reviewed and corrected.

  Example:
  sentence:  भारत   द्वारा  बनाया  गया Unified Payments Interface  यानि   UPI    भारत   की    एक   बहुत  बड़ी   success  story  है    ।
  POS tags: PROPN  ADP VERB VERB  PROPN   PROPN    PROPN    CONJ  PROPN  PROPN ADP  DET  ADJ  ADJ    NOUN    NOUN  VERB  X

• Named Entity Recognition (NER): Identification of entities in Hinglish text.
  Each token is pre-assigned a language tag using the CodeSwitch NLP library, which annotators then reviewed and corrected.

  Example:
  sentence: "मालूम हो कि पेरिस स्थित Financial Action Task Force, FATF ने जून 2018 में पाकिस्तान को ग्रे लिस्ट में रखा था।"
  NER tags: "पेरिस": GPE, "Financial Action Task Force, FATF": ORGANISATION, "2018": Date, "पाकिस्तान": GPE   

• Machine Translation (MT): Parallel translation of sentences in Romanized Hindi and Devanagari Hindi and English languages. Initial translation predictions were generated using the Llama 3.3 LLM, which annotators then refined and corrected.

  Example:
  Hinglish Sentence: "भारत में भी green growth, climate resilient infrastructure और ग्रीन transition पर विशेष रूप से बल दिया जा रहा है।"
  English Translation: "In India too, special emphasis is being given to green growth, climate resilient infrastructure, and green transition."
  Romanized Hindi Translation: "Bharat mein bhi green growth, climate resilient infrastructure aur green transition par vishesh roop se bal diya ja raha hai."
  Devnagari Hindi Translation: "भारत में भी हरित विकास, जलवायु सहनशील आधारिक संरचना और हरित संक्रमण पर विशेष रूप से बल दिया जा रहा है।"

Dataset Usage Disclaimer ‼️

This dataset is a research preview and is subject to ongoing iterative updates. As such, it provides only limited safety measures and may contain biased or offensive content.

Contact US ✉️

Lingo Research Group at IIT Gandhinagar, India
Mail at: [email protected]

Citation

If you use this dataset, please cite the following work:

@misc{sheth2025comilinguaexpertannotatedlargescale,
      title={COMI-LINGUA: Expert Annotated Large-Scale Dataset for Multitask NLP in Hindi-English Code-Mixing}, 
      author={Rajvee Sheth and Himanshu Beniwal and Mayank Singh},
      year={2025},
      eprint={2503.21670},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2503.21670}, 
}