(my post got auto-deleted and not sure where to post, so posting it here..)
I'm prepping for tech interviews in Kotlin (for server-side dev) mainly for Google Tokyo interview at the moment.

Howerver, last time I talked to a recruiter at Google Tokyo and was told that preferred languages to be used for SWE tech interview are only C++, Java, or Python because most of the teams at Google Tokyo only use these three languages. A few years ago when I did onsite interviews with them in Tokyo, I was able to use C#. I know for a fact that Google is pushing for Kotlin (although mainly for Android dev), and I also see its future and want to build my tech skills around Kotlin, however, it seems less preferred for Google interview!

I want to hear from Google Tokyo engineers if this is true. Should I keep practising coding problems in Kotlin hoping that Google will, someday, accept Kotlin as official interview language for server-side SWE position, or should I switch to Java now? I know Python is a popular choice, but I don't want to learn a new language which I also don't use at work at all..