It must be really convenient speaking more than one language in Hollywood. It could potentially open up more than one door for an actor or actress.
For the actors and actresses who aren’t bilingual, it takes a lot more effort to pass as someone who is. They have to practice a language just as much as their lines or any other part of the role.
This happened to Scarlett Johansson when she was cast as Natasha Romanoff, a.k.a. Black Widow in the MCU. You may not know that the comic book character-turned blockbuster heroine is really from Russia.
But one of the reasons why Johansson is the perfect Black Widow is because she took the time to practice her Russian, even though she only spoke a little in the early days of the character.