Hello! I started reading stuff on QFT and it seems that one of the main points is for the Lagrangian to be Lorentz invariant, so that the equations of motion remain the same in all inertial reference frames. I am not sure however i understand how do non inertial reference frames come into play. I didn't take a course on GR yet, but Lorentz group doesn't accommodate accelerated linear motion for example, so a Lorentz scalar in one frame wouldn't be scalar in another frame moving with a non zero acceleration. So how is this taken into account, such that the equations of motion hold true in all frames?