Hello. I can help you, but I can't see the lesson section page 3. I'm Cuban and a Spanish teacher. So, if you give me more details, I can definitely help you.
Todos los pasajeros llegaban al mismo tiempo
1. Pepe es español, mientras que sus amigos Luis, Jorge, Peppa y MariCarmen20 son chino, japonés, mongola y marroquí, respectivamente.
2. The rule is that in nationalities, opposite to Enslish's rule, the first letter is not capital.
3. In my house we don't speak the same language as they speak in Alejandrina's house, we speak a different language, which is much stranger, it is Suahili.