While it's definitely cute and amusing, this is exactly why languages that specify their source code in non-ascii encodings are a bad idea. Fully 92.6% of working programmers have no idea how to produce a λ or γ on their input device of choice. Maybe a third of those could eventually find it with a character picker tool. Java started this (in the unicode era anyway -- yeah yeah, APL). The community quite sanely rejec…
I've seen plenty of code bases which are not in English, since the developers did not have English as their first language. This is usually a well-contemplated decision - for instance, the Ruby language source code is specifically written so that you don't require knowledge of Japanese to understand the core libraries or the C reference implementation.