I grew up in a mixed Asian environment and I would say that if English is really insufficient for one thing, it's for portraying the tonality of languages like Chinese or my native Thai. Regardless of the language of origin, in my neighborhood you would see people respond to English with brusque, emphasized words- usually not accented, because they use the same words time and again, so are very practiced with them.<br/><br/>"Okay! Yes! Really?"<br/><br/>Just a few words like that can get a speaker by in conversation.<em>Okay, </em>I ucomprehend.<em>Yes, </em>I affirm.<em>Really, </em>could you elaborate, or perhaps restate in words more familiar to me?<br/><br/>That's how I might portray a Chinese speaker. Key, oft-repeated words, spoken with energy. The actual tonality is going to be really difficult to get across. I don't think that's unreasonably stereotypical.