Mix polarization refers to the dynamics of polarization states in semiconductor waveguides, particularly under anisotropic Kerr non-linearity. The discussion highlights that stationary solutions and their stability can be analyzed using Stokes polarization parameters, leading to insights into mixed-polarization spatial soliton dynamics. These dynamics can be understood as mixtures of pure polarization states, where time-dependent changes can occur between linear and circular polarizations. The equations governing the electric and magnetic fields can be decoupled into two separate equations, illustrating the concept of mixed polarization. Overall, the exploration of these dynamics provides a deeper understanding of polarization behavior in optical systems.