At another point you just accept you'll have to hire people who don't fit the classic job requirement of "X years experience in Lang" and hire people who don't know Lang at all but want to learn. A growing Clojure shop in Seattle seems to be having success with this, onboarding the language is a small fraction of overall onboarding.
On the more meta level it's weird what people expect devs to learn on the job or know up front. Companies expect employees to keep up with the latest nonsense in web dev, but can't pick up a new straightforward language? Unless maybe another Algol like Go or TypeScript? This Steve Yegge quote captures some of it:
"For some reason, programmers love to learn new stuff, as long as it's not syntax."
On the more meta level it's weird what people expect devs to learn on the job or know up front. Companies expect employees to keep up with the latest nonsense in web dev, but can't pick up a new straightforward language? Unless maybe another Algol like Go or TypeScript? This Steve Yegge quote captures some of it:
"For some reason, programmers love to learn new stuff, as long as it's not syntax."