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IberLEF 2027 -- Call for Task Proposals
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IberLEF (the Iberian Language Evaluation Forum) is a shared evaluation campaign of Natural Language Processing systems in Spanish and other Iberian languages, whose 2027 edition will be held as part of the 43th International Conference of the Spanish Society for Natural Language Processing (SEPLN). The 2027 edition of the SEPLN conference will take place in Santiago de Compostela, Spain.

The goal of IberLEF is to encourage the research community to organize competitive text processing, understanding and generation tasks, with the aim of defining new research challenges and advancing the state of the art in Natural Language Processing challenges involving at least one of the following Iberian languages: Spanish, Portuguese, Catalan, Basque or Galician. Researchers and practitioners from all areas of Natural Language Processing and related communities are invited to submit task proposals that fit IberLEF goals by December 15, 2026.

Proposals must be submitted (as a PDF file) to iberlef@googlegroups.com, and should include the following fields:
- Title of the task.
- Description of the task, highlighting:
- Relevance and novelty of the task, and the challenges involved.
- Evaluation measures, and other relevant methodological aspects.
- Expected target community, and actual or potential industrial takeup.
- Related evaluation activities, if any.
- Previous editions of the task, if any. If it has been organized previously, what the roadmap is and what the novelties for 2027 are.
- Linguistic resources to be gathered, created and/or reused. Please include as many details on data gathering, selection and annotation procedures as possible: sources and representativity, training/validation/test sizes, harvesting procedures, profile of annotators (experts, linguists, crowdworkers, etc.), multiple annotation policy, IPR issues, baselines, etc.
- Definition of clear evaluation criteria and review guidelines to ensure the quality of the working notes papers submitted by participants, specifying the number and type of reviewers (internal or external) assigned to each paper and the steps taken to assess its scientific and technical quality, rather than formatting requirements, which are established by the IberLEF Organizing Committee.
- Tentative schedule (note that camera-ready versions of the proceedings must be ready by July 11, 2027).
- Organization committee: full name and affiliation of the organizers, with a succinct description of their research interests, areas of expertise and experience organizing similar events.
- Funding, if available.
- Contact person.
- Any other relevant issues.

Task organizers duties
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Note that organizers of accepted tasks are expected to:

- Ensure that the task website is ready, publicly accessible, and submitted to the IberLEF organizers no later than one week after receiving the acceptance notification.
- Set up the evaluation exercise according to the submitted proposal.
- Promote the task within the target research community.
- Manage the submission and scientific evaluation of the system description papers of the corresponding systems submitted by the participants. Papers submitted by participants in each task must undergo a rigorous peer-review process and must meet the quality standards established by both the tasks’ organizers and the IberLEF committee to be eligible for publication. The accepted papers will be published in the IberLEF proceedings.
- Prepare and submit an overview paper of the evaluation exercise that will be published in the SEPLN journal.
- Present the results of the task at IberLEF 2027.

Task selection procedure
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Each submitted proposal will be reviewed by members of the IberLEF steering and program committee, and decisions will be sent back to the task organizers by January 29, 2027.

Proceedings
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IberLEF 2027 Proceedings including the description of the participating systems and task Overviews will be published in September 2027. Task Organizers are expected to notify participants the acceptance of their working notes before the camera-ready submission, and send the camera ready task and system description papers for their task to IberLEF organizers by July 11, 2027.

Important dates
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Task proposals due: December 15, 2027.
Notification of acceptance: January 29, 2027.
Working notes and Overview instructions: April 9, 2027.
Overview paper submission: June 20, 2027.
Overview paper notification: June 29, 2027.
Camera-ready submissions (Working notes and Overview): July 11, 2027.
Program planning: July 20, 2027.
IberLEF Workshop: September, 2027.

IberLEF 2027 general chairs
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Helena Gómez Adorno, Universidad Nacional Autónoma de México (Mexico)
Alba Bonet Jover, GPLSI, Universidad de Alicante (Spain)
José Ángel González Barba, TransPerfect (Spain)

Website
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https://sites.google.com/view/iberlef-2027/home

Contact
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E-mail: iberlef@googlegroups.com

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