The [æ] vowel sound, as in trap doesn't exist for many ESL (English as a Second Language) speakers, so they will tend to shift to a more familiar vowel sound when speaking English. When actors are learning a foreign language accent, they need to consider this - plus in can be influenced by which kind of English they learned, such as American or British English. Here's the lowdown:
Maybe that explains the big, fat mouth I'm showing in the thumbnail of this video. My mother would be so proud...
