@fireborn I can see the value in that. I think my first priority would be to collect a lot more feedback about what works for blind users. How many people use eSpeak NG, how many people use Google's app, or something else entirely.
Adding a setting to set up a specific one (such as eSpeak NG in this instance) means that we're essentially endorsing it -- which is fine is it does a good job, but so far we have conflicting feedback about that.
We could mirror it in our app store. We could do the same for Google's app, although both can be obtained from their respective app stores.
Do you believe that a video that shows the steps required to enable this would help? They would be meant as a guide for someone who is assisting the blind user to set it up. It doesn't address the root concern, but might be a stopgap in the meantime.