If one is going to write one of these articles, one should at least get the facts straight.
German is one of the three official languages of Belgium, the others being Dutch and French. However, it's spoken as a native language by less than 1% of the population and it is hardly correct to call it The official language.
Luxembourg also has three official languages. German is one of them, not The official language. In fact, French is used much more in the government, although the press is mostly in German.
I was surprised to see German listed as an official language for Belgium and had to look it up. It is an "officially recognized language.
I was also surprised to see Dutch listed. The Belgians do not speak Dutch, but Flemish. I guess Flemish is a version or dialect of Dutch.