Starting contributing code to Weblate

Understand the Weblate source code by going through Código-fonte do Weblate, Weblate frontend and Weblate internals.

Starting with the codebase

Familiarize yourself with the Weblate codebase, by having a go at the bugs labelled good first issue.

Execução local de Weblate

The most comfortable approach to get started with Weblate development is to follow Installing from sources. It will get you a virtualenv with editable Weblate sources.

  1. Clone the Weblate source code:

    git clone
    cd weblate
  2. Create a virtualenv:

    virtualenv .venv
  3. Install Weblate (for this you need some system dependencies, see Installing from sources):

    pip install -e .
  1. Install all dependencies useful for development:

    pip install -r requirements-dev.txt
  2. Start a development server:

    weblate runserver
  3. Depending on your configuration, you might also want to start Celery workers:

    ./weblate/examples/celery start
  4. To run a test (see Local testing for more details):

    . scripts/test-database
    ./ test

Running Weblate locally in Docker

If you have Docker and docker-compose installed, you can spin up the development environment by simply running:


It will create a development Docker image and start it. Weblate is running on <> and you can sign in as the user admin using admin as the password. The new installation is empty, so you might want to continue with Adding translation projects and components.

The Dockerfile and docker-compose.yml for this are located in the dev-docker directory.

The script also accepts some parameters, to execute tests, run it with the test parameter and then specify any test parameters, for example:

./ test --failfast weblate.trans


Be careful that your Docker containers are up and running before running the tests. You can check that by running the docker ps command.

To display the logs:

./ logs

To stop the background containers, run:

./ stop

Running the script without arguments will re-create the Docker container and restart it.


This is not a suitable setup for production, as it includes several hacks which are insecure, but they make development easier.

Coding Weblate with PyCharm

PyCharm is a known IDE for Python, here are some guidelines to help you set up your Weblate project in it.

Considering you have just cloned the GitHub repository to a folder, just open it with PyCharm. Once the IDE is open, the first step is to specify the interpreter you want to use:


You can either choose to let PyCharm create the virtualenv for you, or select an already existing one:


Don’t forget to install the dependencies once the interpreter is set: Either through the console (the console from the IDE will directly use your virtualenv by default), or through the interface when you get a warning about missing dependencies.

The second step is to set the right info to use Django natively inside PyCharm: The idea is to be able to immediately trigger the unit tests in the IDE. For that you need to specify the root path of the Django project and the path to its settings:


Be careful, the Django project root is the actual root of the repository, not the Weblate sub-directory. About the settings, you could use the weblate/ from the repository, but you could create your own setting and set it there.

The last step is to run the server and to put breakpoints in the code to be able to debug it. This is done by creating a new Django Server configuration:

../_images/pycharm-4.png ../_images/pycharm-5.png


Be careful with the property called No reload: It prevents the server from being reloaded live if you modify files. This allows the existing debugger breakpoints to persist, when they normally would be discarded upon reloading the server.

Bootstrapping your devel instance

You might want to use import_demo to create demo translations and createadmin to make an admin user.