Harald Hammarström
Harald Hammarström is a linguistics researcher who studies word structure and language history with computational methods. He studied computer science at the University of Amsterdam, completed a PhD in computational linguistics at Chalmers in 2009, and held postdoctoral positions in Nijmegen and Leipzig. He coauthored Glottolog/Langdoc, coordinated research on computational language history, and coauthored digital resources for studying the world's grammars and language identifiers. As of October 2026, he is Professor in General Linguistics at Uppsala University and an editor of Glottolog 5.3.
Timeline
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2007
Morphology from written text
In 2007, he writes a licentiate thesis on unsupervised learning of morphology from text. It describes a simple model of concatenative affixation, which explains how stems and affixes build words.
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2009
A computational linguistics PhD
He studies computer science at the University of Amsterdam and earns a PhD in computational linguistics at Chalmers in 2009. His postdoctoral positions are at Radboud University Nijmegen and the Max Planck Institute for Evolutionary Anthropology in Leipzig.
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2012
Glottolog/Langdoc bibliography
With Sebastian Nordhoff, he coauthors a 2012 paper presenting Glottolog/Langdoc, a bibliography that gives web access to 180,000 records for low-visibility resources from low-density languages.
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2015
Algorithms for language history
At NIAS, he coordinates the Capturing Phylogenetic Algorithms for Linguistics theme group from September 2015 to November 2015. Its research question is how a computer can calculate language history from linguistic data.
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2020
The DReaM Corpus
In 2020, he coauthors The DReaM Corpus, a multilingual digital collection of thousands of grammars that users can search through established corpus infrastructures. Its metadata and text annotations support searching and analysis.
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2022
Glottocodes for language data
In 2022, he and Robert Forkel describe Glottocodes, identifiers that link language families, languages, and dialects to reference information.
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As of October 2026
Professor at Uppsala
As of October 2026, he is Professor in General Linguistics at the Department of Linguistics and Philology at Uppsala University. In April 2026, he travels the world to study and document rare and unique languages. He co-edits Glottolog 5.3 with Robert Forkel, Martin Haspelmath, and Sebastian Bank.
Sources and credits
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- Unsupervised Learning of Morphology: Survey, Model, Algorithm and Experiments
- Harald Hammarström documents languages on the verge of extinction — Uppsala University
- Glottolog 5.3 — About
- Harald Hammarström — ACL Anthology
- Hammarström, Harald — NIAS
- The DReaM Corpus: A Multilingual Annotated Corpus of Grammars for the World's Languages — ACL Anthology
- Harald Hammarström — Uppsala University