Home of FreeCAD's (https://www.freecadweb.org
) translation files. FreeCAD is an open source CAD/CAM solution with a Python API. The translations include the FreeCAD interface itself and it's web homepage. The documentation is also translatable, but is handled directly on the wiki at https://www.freecadweb.org/wiki/
If you wish to translate FreeCAD in a language that is not listed below, just send a message to @Yorik and @luzpaz and it will be added.
Please note that due to the very technical nature of FreeCAD, and the necessity to understand well the different OCC concepts, we can only allow as proofreaders people with a substantial activity here or in the FreeCAD community. Thanks for understanding!