In the author's defense, it's not like he outlandishly says ".net is a language" -- it's fairly common to refer to the framework when discussing stacks because

In the author's defense, it's not like he outlandishly says ".net is a language" -- it's fairly common to refer to the framework when discussing stacks because of specificity. Saying "I program Rails apps" is clear, and Ruby is assumed. Technically, I don't "program in Rails" is if it was a language, but since the knowledge needed to effectively work with a framework is so involved, it's worth stating.