I have never bought the party line that learning languages for a new job is difficult, particularly from hiring managers. Multiple times in my career I've taken

I have never bought the party line that learning languages for a new job is difficult, particularly from hiring managers. Multiple times in my career I've taken a job which required a new language, scala most recently. These all involved new frameworks, library stacks, etc. In each of those cases I was reasonably productive after a couple of weeks and productive enough after a month or two. It's not like I was the world's expert in those languages and at that point and I'd probably flub the sort of interview questions focused on the nitty gritty (heck, I've never been good at those regardless) but I knew what I wanted to do, had a good idea of how to do it and a minute or so with google would fill in the rest.