A free/open-source platform for machine translation and language technology

Apertium is a free/open-source machine translation platform, initially aimed at related-language pairs (such as Spanish–Catalan) but which has been expanded to deal with more divergent language pairs (such as English–Catalan and even Basque→English). The platform provides:

  • a language-independent machine translation engine
  • tools to manage the linguistic data necessary to build a machine translation system for a given language pair and
  • linguistic data for a growing number of languages and language pairs

We particularly aim at supporting low-resourced and marginalised languages, and in addition to machine translation work on a variety of other natural language processing and language technology applications: spellchecking, morphological analysis, treebanking, etc.

Primary Open Source License: GNU General Public License version 3.0 (GPL-3.0)

Programming Languages:

  • c++
  • python
  • js
  • css
  • html


  • natural language
  • machine translation