I think the whole argument about languages is a bit artificial.
There is a good reason why certain communities have their de-facto “standard language”.
For electronics and computer related suject matters it is mainly English. The same language as in science. You wont get very far in science, because not every paper you need to read will be available in your native language. Ok, it is English, in the past, it used to be Latin, or Sanskrit.
You spwak Spanish. Ok, lets say you have the editor in Spanish. In what language would you talk about it to another developer from somewhere else? Should he learn Spanish?
There was en effort a while ago to make everyone in Europe speak German, which they did not take too kindly :o
And we can be happy that Engish got established as dominant science/tech language (at least in the western world).
It has the most simple grammar you can imagine. Only one gender, lot less irregular and more “universal” verbs like “to get”. You can split infinitives an noone cares. 
It has a really logic composition of tenses “I am, I have been, I was, I had been, I had had been”.
In German, you have three articles (male, femal, neutral) and verbs are much more irregular.
Also, English texts are usually much shorter than other languages. The German edition of a standard textbook usually has 25% more pages with the same print format than the english original.
Well, not really, For example, I wouldnt know how I should pronounce words like “Hacienda” or “Asunción” correctly… Is it an “S” sound where you have to bite your tongue like “Barsffsfelona”?
To just my 2 cents on this.
Im happy with EU4 being available in English. (Most German translations would be too verbose anyway to fit into the UI )