Does the course look at any other programming languages such as Python or C#?

After completing the course - you'll be able to work / code in any coding language.

Programming languages and frameworks (especially front-end JavaScript frameworks) come and go, depending on current trends. For back-end: we’ve seen Rails ride to the top then become a mainstream technology, Node.js becoming a viable alternative for big enterprise, Java and .NET’s popularity rise, fall and rise again. 

We've chosen Ruby - it's easy to learn. You can read more about why here