As an open source project, the source code to diagrams.net is stored on Github.
This includes the core source code, plugins, and a number of integrations and extensions, as well as the source to the diagrams.net website.
To raise an issue or request a feature for diagrams.net online or desktop, please raise an issue in the Github project.
diagrams.net aims to provide free, high quality diagramming software for everyone, and ensure the user interface is available in as many different languages as possible.
Learn more about translating the diagrams.net user interface