"Je souhaite pouvoir parler espagnol car ce serait beaucoup plus facile de jouer des rôles plus intéressants."

Simplified Meaning:

When someone says they wish they could speak Spanish because it would help them get more interesting acting roles, they mean that knowing another language can open up more opportunities. Think about it like this: if you only speak one language, you can only talk to people who understand that language. But if you learn another language, you can talk to more people and understand more stories. For example, an actor who only speaks English might only get roles in English movies. If they learn Spanish, they could also act in Spanish movies, which means they could play different types of characters and be part of different kinds of stories. This gives them more chances to do interesting and varied work. In daily life, learning a new language can be useful in many other ways, too. For instance, it can make travel more enjoyable and help you understand different cultures better. It makes you more adaptable and can even help in jobs that require communication with people from different backgrounds.