SIGMORPHON 2021: 18th SIGMORPHON Workshop on Computational Research in Phonetics, Phonology, and Morphology

SIGMORPHON 2021 will be co-located with ACL-IJCNLP 2021 in Bangkok, Thailand, on Thursday, August 5, 2021.
update: As ACL 2021 has moved completely virtual, SIGMORPHON 2021 will be doing so, as well. Details to come.

SIGMORPHON aims to bring together researchers interested in applying computational techniques to problems in morphology, phonology, and phonetics. Work that addresses orthographic issues is also welcome. Papers will be on substantial, original, and unpublished research on these topics, potentially including strong work in progress. Appropriate topics include (but are not limited to) the following as they relate to the areas of the workshop:

  • New formalisms, computational treatments, or probabilistic models of existing linguistic formalisms
  • Unsupervised, semi-supervised, or machine learning of linguistic knowledge
  • Analysis or exploitation of multilingual, multi-dialectal, or diachronic data
  • Integration of morphology, phonology, or phonetics with other NLP tasks
  • Algorithms for string analysis and manipulation, including finite-state methods
  • Models of psycholinguistic experiments
  • Approaches to orthographic variation
  • Approaches to morphological reinflection
  • Corpus linguistics
  • Machine transliteration and back-transliteration
  • Morpheme identification and word segmentation
  • Speech technologies relating to phonetics or phonology
  • Speech science (both production and comprehension)
  • Instructional technologies for second-language learners
  • Tools and resources

SIGMORPHON encourages interaction between work in computational linguistics and work in theoretical phonetics, phonology and morphology, and to ensure that each of these fields profits from the interaction. Our recent meetings have been successful in this regard, and we hope to see this continue in 2021.

Many mainstream linguists studying phonetics, phonology and morphology are employing computational tools and models that are of considerable interest to computational linguists. Similarly, models and tools developed by and for computational linguists may be of interest to theoretical linguists working in these areas. This workshop provides a forum for these researchers to interact and become exposed to each others’ ideas and research.


Registration for SIGMORPHON is conducted through ACL - please register for the conference for access to the workshop.
Early registration ends on July 11, 2021. Regular registration will be available throughout the conference.


Our workshop program is available here.


Our workshop proceedings are available here

Important Dates

December 21, 2020: First Call for Workshop Papers
April 26 May 3, 2021: Workshop Paper Due Date
May 28, 2021: Notification of Acceptance
June 7, 2021: Camera-ready papers due
August 5, 2021: Workshop Date

Paper submission



Long papers should be original, topical, and clear. Completed work is preferable to intended work. Either way, the paper must disclose the state of completion of the reported results. We also encourage short submissions. These can either cover research or describe important problems (new or old).

Submission format

The only accepted format for submitted papers is Adobe PDF. Submissions should be anonymous, without authors or an acknowledgement section; self-citations should appear in third person. Submissions should follow the two-column format of ACL proceedings, and long papers should not exceed eight (8) pages, short papers should not exceed four (4) pages. Unlimited additional pages are allowed for the references section in both cases. However, all material other than the bibliography must fall within the first 8/4 pages! The camera-ready submission will be allowed to have 1 extra page to address reviewer concerns. We encourage the submission of supplemental material such as data and code, as well as appendices; however, supplemental material should not be essential for the understanding of the submission. We strongly recommend the use of the LaTeX style files or Microsoft Word document template on the ACL conference website. We reserve the right to reject submissions that do not conform to these styles, including font size restrictions.

Anonymity period

SIGMORPHON 2021 adopts ACL’s new policies for submission, review, and citation. Submissions that violate any of these policies will be rejected without review. Most importantly, the policies refer to the anonymity period, which begins one month before the 2021 submission deadline and ends at time of notification (or withdrawal).

Mentorship Program

This year SIGMORPHON plans to offer a mentorship program in conjunction with its 2021 workshop. The goal of the program is to connect researchers new to the field of computational morphology and phonology with more experienced members of our sub-community. Any researcher may request mentorship by filling out TBA. Those who sign up will be matched with more senior researchers who will act as a mentor and both of you will be placed in contact. As ACL 2021 will be virtual, we expect all mentorship to take place remotely this year.

How will SIGMORPHON’s mentorship work?

We will organize remote 1-on-1 mentoring sessions. Through our mentorship program, SIGMORPHON hopes to specifically reach the following groups: Not-yet-graduate students considering applying to doctoral programs, Graduate students who will soon enter the academic or industrial job market, Students seeking feedback on high-level research ideas. However, in principle, anyone can sign up!

What is SIGMORPHON mentorship?

The exact nature will depend on the particular mentor–mentee pairing. However, the default assumption, unless otherwise negotiated, is that there should be a 1-hour meeting between the mentor and mentee. SIGMORPHON encourages further cultivation of the mentorship if fitting.

Matched mentors and mentees will be placed in contact and are expected to set up one or more virtual meetings during the week TBA. Please email Ryan Cotterell with any questions.

Invited Talks

SIGMORPHON is pleased to welcome the following invited speakers to our workshop.

For more information, please visit here.

Program Committee

Damián Blasi, Harvard University
Grzegorz Chrupała, Tilburg University
Jane Chandlee, Haverford College
Çağrı Çöltekin, University of Tübingen
Daniel Dakota, Indiana University
Colin de la Higuera, University of Nantes
Micha Elsner, The Ohio State University
Nizar Habash, NYU Abu Dhabi
Jeffrey Heinz, University of Delaware
Mans Hulden, University of Colorado
Adam Jardine, Rutgers University
Christo Kirov, Google AI
Greg Kobele, Universität Leipzig
Grzegorz Kondrak, University of Alberta
Sandra Kübler, Indiana University
Adam Lamont, University of Massachusetts Amherst
Kevin McMullin, University of Ottawa
Kemal Oflazer, CMU Qatar
Jeff Parker, Brigham Young University
Gerald Penn, University of Toronto
Jelena Prokic, Universiteit Leiden
Miikka Silfverberg, University of British Columbia
Kairit Sirts, University of Tartu
Kenneth Steimel, Indiana University
Reut Tsarfaty, Bar-Ilan University
Francis Tyers, Indiana University
Ekaterina Vylomova, University of Melbourne
Adina Williams, Facebook AI Research
Anssi Yli-Jyrä, University of Helsinki
Kristine Yu, University of Massachusetts


  • Garrett Nicolai, University of British Columbia
  • Kyle Gorman, City University of New York
  • Ryan Cotterell, ETH Zürich

Email address: <>

Shared Task

This year, SIGMORPHON is hosting three shared tasks: