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The amazing Murre will normalize non-standard Finnish and Swedish, and dialectalize standard Finnish!

Project description

🐶 Murre 🐕


The amazing Murre (genitive Murren 🐕) will normalize non-standard Finnish (puhekieli) to standard Finnish (kirjakieli). This repository is maintained by Mika Hämäläinen.


This library is designed for Python 3 and it may not work on Python 2.

pip3 install murre
python3 -m


To normalize Finnish, all you need to do is to run:

from murre import normalize_sentence

normalize_sentence("mä syön paljo karkkii")
>> minä syön paljon karkkia

You can normalize multiple sentences at the same time by running

from murre import normalize_sentences

sents = ["kissa syö karkkii", "jok laulaa tuol puole", "en tiiä oikee et kuka se o", "kyl on hölömöö"]
>> ['kissa syö karkkia', 'joka laulaa tuolla puolen', 'en tiedä oikein että kuka se on', 'kyllä on hölmöä']

Historical Finnish

To normalize (and lemmatize) historical Finnish, run:

from murre import normalize_sentence

normalize_sentence("paluellen herra caiken", language="fin_hist")
>> palvella herra kaikki


You can use the Swedish model by passing language=swe

from murre import normalize_sentence

normalize_sentence("int vet ja", language="swe")
>> inte vet jag


Murre can also generate different dialects. All you need to do, is to run:

from murre import dialectalize_sentence
dialectalize_sentence("kodin takana on koira", "Inkerinsuomalaismurteet")
>> 'kojin takan on koira'

Or for multiple sentences:

from murre import dialectalize_sentences
sents = ["kissa syö karkkia", "kädellä on perhonen", "kettu juoksee sutta karkuun"]
>> ['kissa syöpi karkkia', 'käellä om perhonej', 'kettu juoksee sutta karkuu']

The list of available dialects can be obtained by:

from murre import supported_dialects
>> ['Pohjois-Satakunta', 'Keski-Karjala', 'Kainuu', 'Etelä-Pohjanmaa', 'Etelä-Satakunta', 'Pohjois-Savo', 'Pohjois-Karjala', 'Keski-Pohjanmaa', 'Kaakkois-Häme', 'PohjoinenKeski-Suomi', 'Pohjois-Pohjanmaa', 'PohjoinenVarsinais-Suomi', 'Etelä-Karjala', 'Länsi-Uusimaa', 'Inkerinsuomalaismurteet', 'LäntinenKeski-Suomi', 'Länsi-Satakunta', 'Etelä-Savo', 'Länsipohja', 'Pohjois-Häme', 'EteläinenKeski-Suomi', 'Etelä-Häme', 'Peräpohjola']

Business solutions

Rootroo logo

Non-standard dialectal data can be a mess to deal with when you are processing your customer data. Let us help! Rootroo offers consulting related to text normalization. We have a strong academic background in the state-of-the-art AI solutions for every NLP need. Just contact us, we won't bite.


Normalization (Finnish)

Niko Partanen, Mika Hämäläinen, and Khalid Alnajjar. (2019). Dialect Text Normalization to Normative Standard Finnish. In the Proceedings of the 5th Workshop on Noisy User-generated Text (W-NUT).

Normalization (Swedish)

Mika Hämäläinen, Niko Partanen and Khalid Alnajjar. (2020). Normalization of Different Swedish Dialects Spoken in Finland. In the Proceedings of the 4th ACM SIGSPATIAL Workshop on Geospatial Humanities.

Dialect generation

Mika Hämäläinen, Niko Partanen, Khalid Alnajjar, Jack Rueter & Thierry Poibeau (2020). Automatic Dialect Adaptation in Finnish and its Effect on Perceived Creativity. In Proceedings of the 11th International Conference on Computational Creativity. p. 204-211

Historical Finnish

Mika Hämäläinen, Niko Partanen and Khalid Alnajjar. (2021). Lemmatization of Historical Old Literary Finnish Texts in Modern Orthography. In Actes de la Conférence sur le Traitement Automatique des Langues Naturelles (TALN).


The data used in the paper describing dialect generation has been published on Zenodo DOI.

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