English, please. For German, use the #languages:deutsch category. It’s what it’s there for.
HEADS UP, EVERYONE! 
The Manjaro forum has distinct language categories for…
- Dutch (#languages:nederlands)
- German (#languages:deutsch)
- French (#languages:francais)
- Spanish (#languages:espanol).
People who natively speak yet other languages than English and don’t know how to express themselves in English can post in the generic #languages category — preferably with a tag to denote which language they’re using, because this is not always clear due to, for instance, multiple languages using Cyrillic, Coptic, Kanji, Arabic, or other alphabets.
The reason why there aren’t any more language categories than the four above — or five if you include the parent #languages category — is simply that we currently don’t have any moderators available anymore who would be able to monitor categories in any of the non-English languages not already represented by a dedicated category.
Now, while it is always possible that a completely new member would fail to find a suitable language category and would thus post in their own language in the English-spoken sections of the forum, the fact is and remains that — apart from the designated language categories listed above — the official language here at the Manjaro forum itself is English.
This does not mean in any way, shape or form that one could not interject a single phrase in another language as a form of humor somewhere, but lately the staff and several longstanding members have been noticing an increase in the amount of posts in German by native German-speakers who are perfectly capable of communicating in English and who have been members here long enough to know the rules, but who simply resort to German out of laziness. This even goes so far as that originally English-spoken threads under Support or any of its subcategories suddenly get converted into German-speaking threads midway.
This is antisocial, because while roughly a third of the planet understands English (to varying degrees), not everyone outside of Germany, Switzerland and Austria speaks or understands German.
The language to be used at the Manjaro forum is English — for both official and unofficial communication. Therefore, German-language posts in the English-spoken public sections of the forum will from here on simply be deleted by the staff, no questions asked.
Thank you for reading.