Conference article

Automatic conversion of colloquial Finnish to standard Finnish

Inari Listenmaa
Chalmers Institute of Technology, Sweden

Francis M. Tyers
HSL-fakultehta, UiT Norgga árktal šs universitehtaNorway

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Published in: Proceedings of the 20th Nordic Conference of Computational Linguistics, NODALIDA 2015, May 11-13, 2015, Vilnius, Lithuania

Linköping Electronic Conference Proceedings 109:27, s. 219-223

NEALT Proceedings Series 23:27, s. 219-223

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Published: 2015-05-06

ISBN: 978-91-7519-098-3

ISSN: 1650-3686 (print), 1650-3740 (online)


This paper presents an unsupervised method for converting between colloquial Finnish and standard Finnish. The method relies upon a small number of orthographical rules combined with a large language model of standard Finnish for ranking the possible conversions. Aside from this contribution, the paper also presents an evaluation corpus consisting of aligned sentences in colloquial Finnish, orthographically-standardised colloquial Finnish and standard Finnish. The methods we present outperforms the baseline of simply treating colloquial Finnish as standard Finnish and offers promise for the adaptation of language-technology tools created for standard Finnish to colloquial Finnish. To this end the paper also presents preliminary results which show promise for using normalisation in the machine translation task.


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