A Publicly Available Cross-Platform Lemmatizer for Bulgarian
Grigor Iliev, Nadezhda Borisova, Elena Karashtranova, Dafina, Kostadinova

TL;DR
This paper introduces a free, Java-based, cross-platform Bulgarian lemmatizer distributed as a GATE plugin, achieving about 95% accuracy on a large annotated corpus, filling a gap in available tools.
Contribution
It presents the first publicly available, open-source Bulgarian lemmatizer, providing a new resource for NLP tasks in Bulgarian language processing.
Findings
Achieves approximately 95% accuracy on BulTreeBank-Morph corpus.
Is freely available under GPL v3 license.
Is implemented as a GATE plugin for easy integration.
Abstract
Our dictionary-based lemmatizer for the Bulgarian language presented here is distributed as free software, publicly available to download and use under the GPL v3 license. The presented software is written entirely in Java and is distributed as a GATE plugin. To our best knowledge, at the time of writing this article, there are not any other free lemmatization tools specifically targeting the Bulgarian language. The presented lemmatizer is a work in progress and currently yields an accuracy of about 95% in comparison to the manually annotated corpus BulTreeBank-Morph, which contains 273933 tokens.
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Taxonomy
TopicsNatural Language Processing Techniques
