How do you avoid language familiarity bias? I've had one interview like this and am sure I did much worse just because the language was Javascript, which I have

How do you avoid language familiarity bias? I've had one interview like this and am sure I did much worse just because the language was Javascript, which I have limited experience with. Intuitively I'd expect that not to make much difference since most mainstream languages are pretty similar, and the interview wasn't syntax oriented. But that's not what I experienced. Signal to noise ratio was there and definitely affected speed of processing the code. (To answer my own question, for coding interview style algorithmic questions, it should be easy for the company to translate the questions to the applicant's preferred language before the interview. (if not then it's probably not a good interview question). Hopefully this company does that.) Obviously if the company explicitly wants the candidate to be familiar with deep aspects of whatever language you use, then this doesn't matter. I can imagine hypothetical cases where this would hold, but I'd think it relatively rare.