I've been in foreign countries with languages I don't have any knowledge of. Learning 3 words is not a problem, and is kind of fun. Usually, I learn yes, no, please and thank you. Those words will get you amazingly far!
Maybe some people think R2D2 beeps and chirps are better, but sorry, I have no interest in learning the binary language of vaporators.
I don't want tunes. I want a voice. It is not any harder to learn 3 Japanese words than 3 random tunes. You don't have to learn Japanese. It's 3 words.
It's the same thing as those stupid icons on buttons. The rationale is that some pre-contact tribesman will have a car and not know English. Well, he isn't going to know what the ancient Mesopotamian oil lamp icon is, either. And learning 3 English words is not a tragedy. At least the words can be looked up. The icons (and beeps) cannot.
Boeing found out the problem with "beeping" alarms.
The first time they installed a warning horn, I think it was the stall warning, it was a big success. So, they started adding different horns for other situations. At one point, in an emergency, the pilot got confused about which horn meant what, and had an accident.
So now, Boeing replaced horns with a voice, like "pull up". Sounds obvious, right?
But car beeps generally give no clue what they're beeping about.
Decades ago, I wondered why elevators announced floors with a beep. If you're blind, you have no idea what floor you're on. I thought a voice would be better. 50 years later, I heard some elevators announce the floor with a voice.
P.S. It's not a technology issue. The IBM PC had an I/O port wired to the speaker. You could give the speaker +5V or 0V, making a square wave only, an annoying buzzing sound. But then some genius discovered that if you ran a wave form through a clipper which gave a sequence of 1s and 0s, running that produced quite a credible voice sound.
P.P.S. My furnace gives its status in the form of a blinking LED. A fast blink means broken, slower blink means A-OK. Of course, when you're faced with a blinking LED, is it blinking fast or slow?
It's stunning the progress humans have made since then.