Apertium offline translator

    Apertium offline translator icon

    Apertium offline translator

    by: 110 7.6

    7.6 Users



    This is a free/open-source, offline machine translation app.

    It doesn't require an internet connection to work and you don't need to send confidential text through the Internet to get a translation.


    You can mark text in e.g. the web browser, long-click and select to "Share" with Apertium to put it into the translator.

    The first translation you do will be probably be slow, on older phones it can take up to a minute.
    The subsequent translations will be faster.

    On smaller phones you are advised to start out installing just one language pair.

    To download language pairs we require internet access.
    If you feel unconfident about that, you can switch off data connections while translating, or... you can download the source code and build your own version!


    Afrikaans Dutch
    Basque English
    Basque Spanish
    Catalan Italian
    English Catalan
    English Galician
    English Spanish
    Esperanto Catalan
    Esperanto English
    Esperanto French
    Esperanto Spanish
    French Catalan
    French Spanish
    Haitian English
    Occitan Catalan
    Occitan Spanish
    Portuguese Catalan
    Portuguese Galician
    Spanish Aragonese
    Spanish Catalan
    Spanish Galician
    Spanish Portuguese
    Spanish Romanian
    Swedish Danish

    Want to make your own language pair?

    It takes around 3 months of full time work to create a language pair from scratch.
    We at Apertium will help you, of course, and if you are a student you could consider engaging in Apertium work being sponsored by the Google Summer of Code free/open-source
    program. See


    Apertium can also be installed on your own desktop machine, and is bundled with several GNU/Linux flavors.

    If you want to quickly try it out on your desktop machine there are zero-install Java web start applets for most languages. Please see:


    This app would not have been possible without the support of Google Summer of Code (GSoC) stipends.

    2012 GSoC student Mikel Artetxe - Making Java port of lttoolbox (dictionary engine) embeddable

    2012 GSoC student Arink Verma - Created an Android app using lttoolbox-java

    2012 GSoC Jacob Nordfalk - Mentor of Mikel and Arink
    Re-engineering of lttoolbox-java for memory-constrained devices
    Android app revision autumn 2012

    2010 GSoC student Stephen Tigner - Java port of the Apertium C++ library

    2009 GSoC student 2009 Raphaël Laurent - Java port of the Apertium C++ library

    2008 Nic Cottrell - Initial draft of Java port

    2009-2012 Jacob Nordfalk - Maintainer and GSOC mentor

    Tags: apertium offline translator

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