I think the article tagline would be better "Domain Specific Languages for data analysis". Fortunately, the article does mention Python which is critical because new people might not recognize just how prevalent Python is for solving data analysis problems after reading this. The great work of the SciPy community has enabled Python to be used for all of the things that Matlab, R, and Julia can do. In addition, Python can integrate easily with these languages, so if you are a data analyst you need to learn Python.