This is a test of the languages attribute of the <voice> element. A voice that can speak English with Chinese accent and Chinese with Chinese accent should be selected. This test can be manually changed to your supported two languages and accents. For example, a languages value of "en:zh zh:zh-Latn" can legally be matched by any voice that can both read English (speaking it with a Chinese accent) and read Chinese (speaking it with a Chinese accent). Please notic that the script and extension subtags of the accent MUST be ignored by the synthesis processor.Thus, a voice that only supports "en-US" with a "zh-CN" accent and "zh-CN" with a "zh-CN" accent would match. If we have a languages value of "en:zh zh:zh" and there is no voice that supports English with a Chinese accent and Chinese with Chinese accent, 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 Öйú.