How do I respond to not knowing the primary language for a role?

I can adapt to the new languages and frameworks to succeed in their role

1. Show that you have done it before - If you have picked up multiple stacks in your current role, talk about that. If you were successfully able to flow between stacks in your past, that shows that you have a good shot of doing it in the future. The best indicator of future behavior is past behavior.
2. Just learn the new language - You don't need to wait until joining the new team to learn the new stack; in fact, you don't need to wait for anybody before learning anything in software. If there's a bunch of roles that require Ruby on Rails for example and you have never built anything with it before, go out and build something cool with it like a side project. That's such a well-defined tech stack that there's tons of great resources for it. Here's a good playlist on side projects: [Taro Top 10] Building Impressive Side Projects

Here's our resources on learning new codebases as well:

• "What is the effective way to understand new repository in order to make the required changes in that repo?"
• "How to Learn/Practice Clean Code, particularly by oneself?"

You want to demonstrate that it's as much of a non-issue as possible. Two ways of doing this:

• Show how you've been able to learn frameworks or languages in the past quickly.
• Explain how you'd go about ramping up quickly.

You can get pretty far in a week or two. If I was interviewing you, I'd be very impressed with any candidate that said something like this:

In the past 2 weeks, I built this toy project with Ruby on Rails just to familiarize myself. Here are my thoughts:

I highly recommend going through the masterclass: [Masterclass] How To Learn Quickly In Tech