The TTS engine is not having enough delay between words (especially between "Ale on"), and it sounds unnatural. I've heard and been in conversations with speed speakers, but this is something completely different. Duolingo needs to take a beat longer between words, even for fast speakers.
It seems common to have discussions like this for unusual phrases and non typical words. For our levels of Czech, I think it would be better to use standard phrases and words to reduce confusion. I appreciate the CZ course, I just want to help. Hope this is the correct place. :-)
I'm just talking about any time you might be referring to a masculine noun and remarking that it's different. For instance, if you were looking at a car with a pattern painted on it, or a picture of a tree that is very different from the types of trees that you have seen before. Those are not called "he" in English, so I thought that "it" would be an acceptable answer.
Please be specific, I can'r think of a situation where it would be natural. Automobil really isn't "on" unless you personificate him and call him "he" in English.
I think it will only work for persons or animals that would be "he" in English as well (a cat named Tom, a mouse called Jerry,...).