While they aren't "languages" in the traditional sense, programming languages certainly differ from one another. In some cases, learning programming languages can be like learning spoken languages, and we could offer some techniques to learn programming languages faster.
I'm not talking about what is allowed on StackOverflow. I'm asking about questions to quickly gain mastery over programming languages, like "Should I learn multiple programming languages at once?" or "Should I learn binary/octal before learning X language?" Questions about specific programming languages and problems wouldn't belong here, just as questions about specific spoken languages and grammar don't.