You are right. It's not a feature per se, and I removed it from the bullet points. Thanks for the feedback.

No, but it's likely faster than something written in Python and more memory efficient then something in Java.

I generally have the same reaction, however if it's an open source project then I suppose the language is a feature, because it tells you how easy it might be for you to modify it based on the languages you are most familiar with.

For closed source though I wouldn't class the language as feature

When it's the current flavour of the month, yes.