i would say "not this one" :p This question asks, "What languages is [sic] spoken at home?" With reference to my home, this writer would answer the speaker, "Inglés, y ningún otro." It means,...
If it is "Qué habla español en la clase?" The translation would be: "What speaks spanish in the class?" But if it is Quién habla español en la clase?" The translation would be: Who speaks Spanish...