The images in the icons folder are from the Noun Project and require attribution. Each image lists the required attribution. These images should be used for any diagram that needs them to keep imagery consistent.
The Diagrams.sketch file is a Sketch document containing all the diagrams used in the lessons and projects. If you are involved in a translation, please also translate these by either copying and updating the document, or by providing a list of the words you need translated as a GitHub issue.
The rest of the images are used throughout the lessons and projects.