There are currently advancements of devices that can read our brain and interpret the signals, allowing us to control devices with our minds (my answer here to another question).
With what we can do now, I can only assume that eventually we will have inputs as well. With universal translators (lots of work in text is available, and supposedly a bit with verbal as well) we could in theory understand anyone via the software.
Now the next step suggests that when we have input to the brain, allowing for direct 'speech', then we could in theory have a conversation with anyone no matter their native language. (at least we could understand them, even if they didn't have an implant themselves.)
So I could have a conversation with a native Mandarin speaker and we could both understand each other. Would the next step be just reading our thoughts and sending them? No need to use sound waves to 'speak' any more? Is speech destined to die?