Skip to content
@apertium

Apertium

Free/open-source platform for developing rule-based machine translation systems and language technology

Apertium is a rule-based machine translation toolchain and ecosystem, with many of our tools based on finite-state transducers.

Our language agnostic tools are native and written in C++. The various development helpers are mostly in Python.

Our language data is in various formats, including XML and other human-editable texts. Language data is split into single-language packages that can analyse and generate a given language, and translation pairs that perform transfer and transformation between two languages. The single-language packages are shared amongst many pairs.

If you wish to contribute to the language agnostic native tools you'll need to know C++.

If you wish to contribute language data to Apertium, your contributions should fit in our existing pipeline. That is, it should be rule-based and deterministic. We will happily help you learn our formats and methods, and we know from experience it is possible to learn and use Apertium in short time.

We do not currently include any statistical or neural machine translation tools or methods. We are often asked if contributions can be made with statistical or neural systems, but for now they cannot.

For more information about how to contribute, see Contributing.

Pinned Loading

  1. organisation Public

    Second point of contact for all things Apertium

    TeX 20 6

  2. apertium-trunk Public

    Released Apertium translation pairs

    30 5

  3. apertium-languages Public

    Released Apertium language modules

    39 9

  4. apertium-staging Public

    Unreleased Apertium language modules and pairs with extensive development

    4 1

  5. apertium-nursery Public

    Unreleased Apertium language modules and pairs with some development

    4 2

  6. apertium-tools Public

    Apertium tools

    19 1

Repositories

Showing 10 of 634 repositories
  • apertium-haa Public

    Language module for Hän

    Shell 0 AGPL-3.0 0 0 1 Updated Apr 11, 2025
  • packaging Public

    Debian, Fedora, Windows, macOS packaging scripts for Apertium, HFST, CG-3, and related techs.

    Roff 12 3 16 0 Updated Apr 11, 2025
  • apertium-nno-nob Public

    Apertium translation pair for Norwegian Nynorsk and Norwegian Bokmål

    XML 22 GPL-2.0 10 1 1 Updated Apr 11, 2025
  • apertium-nno Public

    Apertium linguistic data for Norwegian Nynorsk

    XML 4 GPL-2.0 2 1 0 Updated Apr 11, 2025
  • apertium-nob Public

    Apertium linguistic data for Norwegian Bokmål

    XML 8 GPL-2.0 3 0 0 Updated Apr 11, 2025
  • lttoolbox Public

    Finite state compiler, processor and helper tools used by apertium

    C++ 18 GPL-2.0 23 35 (1 issue needs help) 5 Updated Apr 11, 2025
  • apertium-separable Public

    Module for reordering separable/discontiguous multiwords.

    Python 4 GPL-3.0 5 4 2 Updated Apr 11, 2025
  • apertium-regtest Public

    Regression testing system for Apertium language data and translators

    Python 1 GPL-3.0 1 22 (1 issue needs help) 2 Updated Apr 11, 2025
  • apertium-recursive Public

    Recursive structural transfer module for Apertium

    C++ 6 GPL-3.0 4 38 2 Updated Apr 11, 2025
  • apertium-spa-cat Public

    Apertium translation pair for Spanish and Catalan

    XML 8 GPL-2.0 4 42 0 Updated Apr 10, 2025