It's common to have a main language that you know, work with, and are comfortable with. However, it's important to realize that not all programming languages are created for the same purpose. That is why it's very important to use the right tool for the job at hand. Just as you wouldn't attempt to build a house with a pocketknife, you probably wouldn't use a table saw to whittle a stick into a point for a campfire for s'mores.
If you've been in the industry for a while, you have probably heard the term stack. In technology, a stack is the architectural combination of technologies used to create a program or multiple programs in an ecosystem. In the past, applications tended to be large-scale monoliths, built in a "one application to rule them all" mindset. In today's world, the use of monoliths is decreasing in favor of multiple, smaller applications and microservices. In this manner...