You are not missing anything.

Wait, the domain is called "modernescpp.com", that's Moderns Cpp... not Modern Cpp.

Wow, that's not good....

That's intentional as it is a translation of a German blog:

> Because the roots of my blogs are in German, I will continue to call him Modernes C++. That is not by mistake.

http://www.modernescpp.com/index.php/warum-einen-blog-zu-mod...

Not saying it's a good decision...

I'd would say that even in German, the brand was pretty well established: http://www.amazon.de/Modernes-Design-Programmierung-Entwurfs...

Assuming in German C++ is neuter, and referred to with the das article, Modernes Cpp is correct and singular.

No, I totally get that it is a German variant of the English expression "Modern C++", but you have a fair bit of overlap with a very well established brand in the C++ community...

It is.

Hover over the n here: https://en.wiktionary.org/wiki/Plus#German