This is a test of the languages attribute of the <voice> element. A voice that can speak English and Chinese should be selected. This test can be manually changed to your supported two languages. For example, a languages value of "en zh" can legally be matched by any voice that can both read English and read Chinese. Thus, a voice that only supports "en-US" and "zh-CN" would match. If we have a languages value of "en zh"and there is no voice that supports English and Chinese, then a voice selection failure will occur. Note that if no accent indication is given for a language, then any voice that speaks the language is acceptable, regardless of accent. Also, note that author control over language support during voice selection is independent of any value of xml:lang in the text. I come from 中国.