This is really common among open source projects. I frequently come across feature lists containing &quot;Written in X&quot; for many different values of X. In fact, was just complaining about it to a friend of mine just last night. He pointed out that for open source projects, it really <i>can</i> be a feature:  when attracting contributors, the source language is important. It&#x27;s also important for people who just want to study the source for some reason or another.  It can also be an indicator for how readily portable it is:  a program written in C is going to be much more easily ported than one written in Visual Basic, for example.