Why can't text messaging use language instead of typing?

You didn't make it clear. According to your meaning, there are probably two situations: first, you can open the input method, but you can't input it by voice, which means that what you say can't be converted into Chinese characters. This is because voice input needs to be networked, at least you have to turn on the data stream.

In the case of ...; There is also a case where the recording mode cannot be turned on for voice input and transmission. In this case, your management software prohibits related programs from calling the recording function in the permission setting, so you can cancel the related prohibition permission.