British. According to official website, who inquired about the double-speed class, the English pronunciation in the class is British, so the English pronunciation of the double-speed class is British. Double speed classroom is an APP launched by Beijing Youxue-Private One-Day Whale Education Technology Co., Ltd. to provide learning guidance for junior and senior high school students. The learning tools provided by the two-speed classroom include many practical functions, such as point reading, oral assessment, dictation, recitation, homework check and so on.