I want to know the answer to the following question:
Where is Catalan the only official language?
All the background I'm provided with is that "It is the national and only official language of Andorra, and a co-official language of the Spanish autonomous communities of Catalonia, the Balearic Islands, and Valencia (where the language is known as Valencian, and there exist regional standards).". Is that enough to answer the question?
Answer: yes