The talks, interviews or casting are in Spanish too? O nomas in English.

No.

Everything is only in English, but there are several people who have been called for several productions and have had no problem with the language.

Mark Anthony Cooper no mames! Excuse me, ma'am. It is usually all in English so I recommend that you bring someone to help you navigate. But it's easy! I also recommend LA Casting. With them I had to work with a lot of TV in Spanish. Luck!