Here's a short story:

The city of Bern or Berne (German: Bern, pronounced [bɛrn] ( listen); French: Berne [bɛʁn]; Italian: Berna [ˈbɛrna]; Romansh: Berna [ˈbɛrnɐ] (help·info); Bernese German: Bärn [b̥æːrn]) is the de facto capital of Switzerland, referred to by the Swiss as their (e.g. in German) Bundesstadt, or "federal city".[note 1] With a population of 140,634 (November 2015), Bern is the fifth most populous city in Switzerland. The Bern agglomeration, which includes 36 municipalities, had a population of 406,900 in 2014. The metropolitan area had a population of 660,000 in 2000. Bern is also the capital of the Canton of Bern, the second most populous of Switzerland's cantons. 

The official language of Bern is (the Swiss variety of Standard) German, but the main spoken language is the Alemannic Swiss German dialect called Bernese German. 

In 1983 the historic old town in the centre of Bern became a UNESCO World Heritage Site. Bern is ranked among the world’s top ten cities for the best quality of life (2010). (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What is the de facto Swiss capital?
Guess: Bärn

Question: How else it it spelled?
Guess: Bern or Berne

Question: How many people live in the area?
Guess: 406,900 in 2014

Question: How many cities are in there?
Guess: 36

Now answer the following question in the same format.

Question: What is the official language?

German