is hard wrong? I don't understand. Does it have to be difficult they mean the same
Isn't it equally correct to translate this, "The puppy speaks difficult languages."? Singular and plural nouns are not always distinguished in Korean.
In that case, the number would be relevant information that cannot be easily assumed, so the plural marker would likely not get ommited.
Just because we don't get it doesn't mean it's difficult man, who knows HAHA