> Also, why would you conduct an interview in a language where even if you don't know the syntax (and this is obscure) you could have looked it up or disallowed the interview to be done in Python?

The norm in most of my interviews has been that candidates can solve coding problems in whatever language they are most comfortable with. For most languages like Python etc, it would be a mistake to reject a candidate just because they don't have experience with that specific language.