When someone, particularly a beginner, is reading the code and come across, say, an unfamiliar function name, then they know straight away whether to look for it in the language docs or a definition somewhere else in the code. Not essential, but handy.
I guess that only works for really simple project. Once you bring in third party libraries, your own common library, your own multiple layers of abstraction, this naming convention means almost nothing. It pays the price of annoying programmers who are already familiar with the code for not-so useful short term benefit of the very early beginner.
Surely there are better ways to deal with this problem. Different languages have different solutions for this, but completely breaking the naming conventions doesn't seem like the way to go.
That's a really bad thing in my eyes. Why teach a beginner that consistency is something that does not exist?
Also, non-english variables are an abomination! I've worked with code with some finnish variables. Not only is it harder to grok, it's actively distracting.