Add espeak support for Chinese (#1905)

* fix description

* add espeak support for chinese

* add espeak support for chinese

TTS/tts/utils/text/phonemizers/espeak_wrapper.py

@@ -94,6 +94,8 @@ class ESpeak(BasePhonemizer):
         # band-aid for backwards compatibility
         if language == "en":
             language = "en-us"
+        if language == "zh-cn":
+            language = "cmn"
 
         super().__init__(language, punctuations=punctuations, keep_puncs=keep_puncs)
         if backend is not None:

TTS/tts/utils/text/phonemizers/zh_cn_phonemizer.py

@@ -42,7 +42,7 @@ class ZH_CN_Phonemizer(BasePhonemizer):
 
     @staticmethod
     def supported_languages() -> Dict:
-        return {"zh-cn": "Japanese (Japan)"}
+        return {"zh-cn": "Chinese (China)"}
 
     def version(self) -> str:
         return "0.0.1"