You wouldn't immediately know where they're from. They're not typecast by voice. But you would know they're American. Actors who replace their accents with Standard American English tend to fling wider nets during the casting process. But most people pay to dismantle native-speech protocols because they promote stereotypes about intelligence, education, credibility, and social status.
Corporations are louder about their expectations.
Speaking skills distinguish who will be hired or promoted, particularly within the elastic boundaries of a high-tech economy. Immigrants totaled 8 percent of Microsoft's national workforce in 2000 and were sponsored for special three-year visas by the company. Accent bias is leveled all over corporate America, according to Multi Language Consultant's Nelson Leon, who counts Lehman Brothers and Morgan Stanley as clients. Body language, eye contact, and pleasantries count. People just need to be retrained.