That is what Github tells the world about me. It isn't true and they won't let me change it. The problem area I am referring to is Java. The implication is that I have only one language talent, and implicitly that I endorse Java. While Java was a good solution in its first half-decade of life, it has been an increasingly poor solution since then, in my opinion. I did ask Github support to remove that, and they refused.
They "calculate" it from your public Github activity. Not even that - they only calculate it from your public activity on public projects that don't belong to an organisation. For work I did a whole bunch of C# and Python for a public Unity plugin but even that doesn't dilute the Java.