Kate,
I was thinking more along the lines of mechanical devices that help or assist human (speech) evolution by communicating with us in proper diction and language. I wonder if we will be dragged along by our own devices into a new starting point for language.
This brings back a memory of the movie ET. From my memory ET may have used a "Speak and Say" or some such in his "phone home" transmitter.
Those old speaking toys sounded horrible, in every way! It wasn't just a small speaker or distorting amplifier, the data compression they used, LPC, made spoken sounds barely understandable. Prompted by your question, I'd be afraid such toys would negatively influence how children learn to speak or hear speech, but I haven't heard anything about that.
The other thought I had was what happens when we do use devices that are language specific. If we have to buy a new or used wash machine will it be programmed into our native language? But then again, if we purchase a device with a foreign language will that encourage us to become bi-lingual by the very nature of our purchases?
I imagine any language-using device that sells to more than one country, or even for US-only (which is becoming more bilingual, English and Spanish), will have several languages programmed into it, and there will be a small jumper installed inside that tells it which language to speak. Or there might be a menu on a screen when you first turn it on, or it might speak "Press one if you speak English, dos habla Espanol, tres parlez vouz France',..." Having something interact in several languages isn't much beyond handling speech in one language, and users won't need to be "culturally diverse" outside of needing to understand bad translations such as
"Engrish." Goodness help us if we have to say an obscenity to start up the microwave oven.
As far as becoming bi-lingual, I can imagine intentionally setting the microwave to understanding Spanish and learning how to say numbers in Spanish as well as a very few command words. This won't really help one learn another language unless they do some other method of study. Microwave ovens won't really be useful to me until they can be programmed with macros, so I can put one of those Reddenbacker's things in it, say Popcorn, and come back in three and a half minutes to nearly perfectly popped popcorn.
But all these are just the vocal equivalent of the turning dials and pushing buttons we've been doing for decades. Things won't be interesting until another decade or two when you can have a real conversation with a machine.