Solucionado, he hecho esto y ya no me salen los mensajes:
Goto Settings > Additional Settings > Language and Input > scroll down and select Text-to-speech output > You will find a Setting icon infront of Google Text-to-Speech engine option. Tap on that Icon > Click on Install Voice data You will get a list of all languages. Select Chinese (China) from the list And Delete the Voice Set that is shown as downloading If you want you can re-download it. Make sure or check back once again any other language's shows voices downloading... Stop the download . if still the issue persist, goto Settings , installed application - from the all tab - scroll down to Download manager - open it and clear the cache / Clear data . Now it should.gone
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