I am a girl. I will travel to Saudi Arabia in a few days. What should I wear and pay attention to? Does Saudi Arabia speak English?

Are you traveling alone or in a group? If you join a group, don't worry too much. Just wear your usual clothes and try to be naked. If you are alone, I suggest you bring a silk scarf to cover your hair and neck if necessary. Language is a matter of opinion. Highly educated Saudis can also speak English, and most vendors can speak simple English.