Machine translation

Weblate has built in support for several machine translation services and it’s up to the administrator to enable them. The services have different terms of use, so please check whether you are allowed to use them before enabling them in Weblate. The individual services are enabled using MT_SERVICES.

The source language can be configured at Project configuration.

Amagama

Special installation of tmserver run by Virtaal authors.

To enable this service, add weblate.machinery.tmserver.AmagamaTranslation to MT_SERVICES.

Apertium

A free/open-source machine translation platform providing translation to a limited set of languages.

The recommended way to use Apertium is to run your own Apertium APy server.

To enable this service, add weblate.machinery.apertium.ApertiumAPYTranslation to MT_SERVICES and set MT_APERTIUM_APY.

AWS

New in version 3.1.

Amazon Translate is a neural machine translation service for translating text to and from English across a breadth of supported languages.

To enable this service, add weblate.machinery.aws.AWSTranslation to MT_SERVICES, install the boto3 module and set the settings.

Baidu API machine translation

New in version 3.2.

Machine translation service provided by Baidu.

This service uses an API and you need to obtain ID and API key from Baidu.

To enable this service, add weblate.machinery.baidu.BaiduTranslation to MT_SERVICES and set MT_BAIDU_ID and MT_BAIDU_SECRET.

DeepL

New in version 2.20.

DeepL is paid service providing good machine translation for few languages. According to some benchmark it’s currently best available service.

To enable this service, add weblate.machinery.deepl.DeepLTranslation to MT_SERVICES and set MT_DEEPL_KEY.

Glosbe

Free dictionary and translation memory for almost every living language.

API is free to use, but subject to the used data source license. There is a limit of calls that may be done from one IP in fixed period of time, to prevent abuse.

To enable this service, add weblate.machinery.glosbe.GlosbeTranslation to MT_SERVICES.

See also

Glosbe website

Google Translate

Machine translation service provided by Google.

This service uses Translation API and you need to obtain an API key and enable billing on Google API console.

To enable this service, add weblate.machinery.google.GoogleTranslation to MT_SERVICES and set MT_GOOGLE_KEY.

Microsoft Translator

Deprecated since version 2.10.

Note

This service is deprecated by Microsoft and has been replaced by Microsoft Cognitive Services Translator.

Machine translation service provided by Microsoft, it’s known as Bing Translator as well.

You need to register at Azure market and use Client ID and secret from there.

To enable this service, add weblate.machinery.microsoft.MicrosoftTranslation to MT_SERVICES.

Microsoft Cognitive Services Translator

New in version 2.10.

Note

This is replacement service for Microsoft Translator.

Machine transation service provided by Microsoft in Azure portal as a one of Cognitive Services.

You need to register at Azure portal and use the key you obtain there.

To enable this service, add weblate.machinery.microsoft.MicrosoftCognitiveTranslation to MT_SERVICES and set MT_MICROSOFT_COGNITIVE_KEY.

Microsoft Terminology Service

New in version 2.19.

The Microsoft Terminology Service API allows you to programmatically access the terminology, definitions and user interface (UI) strings available on the Language Portal through a web service.

To enable this service, add weblate.machinery.microsoftterminology.MicrosoftTerminologyService to MT_SERVICES.

MyMemory

Huge translation memory with machine translation.

Free, anonymous usage is currently limited to 100 requests/day, or to 1000 requests/day when you provide contact email in MT_MYMEMORY_EMAIL. You can also ask them for more.

To enable this service, add weblate.machinery.mymemory.MyMemoryTranslation to MT_SERVICES and set MT_MYMEMORY_EMAIL.

tmserver

You can run your own translation memory server which is bundled with Translate-toolkit and let Weblate talk to it. You can also use it with amaGama server, which is an enhanced version of tmserver.

First you will want to import some data to the translation memory:

To enable this service, add weblate.machinery.tmserver.TMServerTranslation to MT_SERVICES.

build_tmdb -d /var/lib/tm/db -s en -t cs locale/cs/LC_MESSAGES/django.po
build_tmdb -d /var/lib/tm/db -s en -t de locale/de/LC_MESSAGES/django.po
build_tmdb -d /var/lib/tm/db -s en -t fr locale/fr/LC_MESSAGES/django.po

Now you can start tmserver to listen to your requests:

tmserver -d /var/lib/tm/db

And configure Weblate to talk to it:

MT_TMSERVER = 'http://localhost:8888/tmserver/'

Yandex Translate

Machine translation service provided by Yandex.

This service uses Translation API and you need to obtain API key from Yandex.

To enable this service, add weblate.machinery.yandex.YandexTranslation to MT_SERVICES and set MT_YANDEX_KEY.

Youdao Zhiyun API machine translation

New in version 3.2.

Machine translation service provided by Youdao.

This service uses an API and you need to obtain ID and API key from Youdao.

To enable this service, add weblate.machinery.youdao.YoudaoTranslation to MT_SERVICES and set MT_YOUDAO_ID and MT_YOUDAO_SECRET.

Weblate

Weblate can be source of machine translation as well. It is based on the fulltext engine Whoosh and provides both exact and inexact matches.

To enable these services, add weblate.machinery.weblatetm.WeblateTranslation to MT_SERVICES.

Weblate Translation Memory

New in version 2.20.

The Translation Memory can use used as source for machine translation suggestions as well.

To enable these services, add weblate.memory.machine.WeblateMemory to the MT_SERVICES. This service is enabled by default.

SAP Translation Hub

Machine translation service provided by SAP.

You need to have a SAP account (and enabled the SAP Translation Hub in the SAP Cloud Platform) to use this service.

To enable this service, add weblate.machinery.saptranslationhub.SAPTranslationHub to MT_SERVICES and set appropriate access to either sandbox or productive API.

Note

To access the Sandbox API, you need to set MT_SAP_BASE_URL and MT_SAP_SANDBOX_APIKEY.

To access the productive API, you need to set MT_SAP_BASE_URL, MT_SAP_USERNAME and MT_SAP_PASSWORD.

Custom machine translation

You can also implement your own machine translation services using a few lines of Python code. This example implements translation to a fixed list of languages using dictionary Python module:

# -*- coding: utf-8 -*-
#
# Copyright © 2012 - 2018 Michal Čihař <[email protected]>
#
# This file is part of Weblate <https://weblate.org/>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#
"""Machine translation example."""

from weblate.machinery.base import MachineTranslation
import dictionary


class SampleTranslation(MachineTranslation):
    """Sample machine translation interface."""
    name = 'Sample'

    def download_languages(self):
        """Return list of languages your machine translation supports."""
        return set(('cs',))

    def download_translations(self, source, language, text, unit, user):
        """Return tuple with translations."""
        return [(t, 100, self.name, text) for t in dictionary.translate(text)]

You can list own class in MT_SERVICES and Weblate will start using that.