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Apertium is a free/open-source platform for developing rule-based machine translation systems!

Translators The following pairs have released versions and are considered to be stable: Spanish ⇆ Catalan (es-ca) Spanish ← Romanian (es-ro) French ⇆ Catalan (fr-ca) Occitan ⇆ Catalan (oc-ca) English ⇆ Galician (en-gl) Swedish → Danish (sv-da) Occitan ⇆ Spanish (oc-es) Spanish ⇆ Portuguese (es-pt) English ⇆ Catalan (en-ca) English ⇆ Spanish (en-es) English ⇆ Esperanto (en-eo) Spanish → Asturian (es-ast) Spanish ⇆ Galician (es-gl) French ⇆ Spanish (fr-es) Esperanto ← Spanish (eo-es) Welsh → English (cy-en) Breton → French (br-fr) Icelandic → English (is-en) Esperanto ← Catalan (eo-ca) Portuguese ⇆ Catalan (pt-ca) Portuguese ⇆ Galician (pt-gl) Basque → Spanish (eu-es) Norwegian Nynorsk ⇆ Bokmål (nn-nb) Macedonian ⇆ Bulgarian (mk-bg) Other pairs currently in development may be found in our SVN repository. You can test drive release versions here, and all versions (including versions for unreleased language pairs) here — this has the latest SVN versions (up to 6 hours old). More information can be found on the page: List of language pairs

Documentation Main article: Documentation Using SVN — cheatsheet on how to use SVN for users and developers. Apertium New Language Pair HOWTO — step-by-step description of how to start a new language pair in Apertium. Créer une nouvelle paire de langues Uputstvo za novi jezički par za Apertium Апертиум, как се създава нова езикова двойка Kiel aldoni novan lingvan duon‎ Amestar un par de llingües nuevu Sevel ur c'houblad yezhoù nevez Руководство по созданию новой языковой пары अपर्टियम मे नई भाषा जोडे Contributing to an existing pair — some pointers for contributing to an existing pair. Comment contribuer à une paire de langues existante Frequently Asked Questions — what it says in the link.

Miscellaneous List of dictionaries — total list of all the morphological dictionaries (analysers) available in the project. Translation quality statistics — Details of error rate for each translator.