You can become a Physiology after the MBBS as well as if you go for the course of BSc Physiology followed by a MSc and a PhD course. Many Medical colleges, recruits the Physiology professors being a PhD or a MD as well. So you can acquire any language as per your requirement in order to fulfil your target.

To know more about the Physiology as a career, visit the link below:

https://www.careers360.com/courses/physiology-course

To know more about PhD visit the link below:

https://www.careers360.com/courses/ph-d-doctor-of-philosophy

I hope this answer helps. All the very best for your future endeavors!