Key English
engine.welcome Welcome to in US English :)
engine.lua.reloaded Main LUA instance reloaded
engine.cef.subprocessdied.title Unresponsive UI Process
engine.cef.subprocessdied.msg The UI Process failed to respond in time.
This can happen if an Antivirus blocks the application.

You can eventually get more help there:

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engine.resourceMissing Failed to create resource (is the file missing?):
engine.engineFail Failed to initialize game, shutting down.
engine.msgboxErrorTitle Error
engine.invalidUserpath.title Invalid user path
engine.invalidUserpath.msg cannot access UserPath defined in startup.ini (game folder). Change for a valid path:
engine.windowedModeReq.title Windowed Mode Required
engine.windowedModeReq.msgEditor Please exit the Mission Editor to switch to full screen.
engine.windowedModeReq.msgGUI Please exit the GUI Editor to switch to full screen.
engine.levelModified.title Level Modified
engine.levelModified.msg Level has been modified in the Editor. Save?
engine.nodegrab.fixedwarning CTRL + Middle Mouse Button to unfix nodes
engine.nodegrab.uncoupling Decoupling any attached nodes
engine.nodegrab.coupling Coupling the two nodes
engine.fatalError.errMsg FATAL ERROR:
engine.fatalError.experienced has experienced a fatal error. Clicking on OK will close BeamNG and create a crashreport. Please send the report so we can resolve this problem.