Only if your preferred language is doing so badly in your area that you have no other choice. For instance, I have been using Python all my career, but to this

Only if your preferred language is doing so badly in your area that you have no other choice. For instance, I have been using Python all my career, but to this day it is a niche language in my country. I also know PHP, Java, and C++ from school and personal projects (guess which I used for school and which for personal projects), and I have considered job offers in the past when Python was extremely unmarketable. One of those times I had to move to another city for nearly a year to avoid switching to another language.