Nope, only fromaĝo takes the accusative case, hence the additional n. Kun vino simply attaches itself to accusative form fromaĝon,but is not accusative case itself (it's instrumental case, actually; but that's irrelevant for Esperanto because there is no declension in that case -- the noun stays the same!).
But I understand your confusion. The whole phrase fromaĝon kun vino is in accusative here, but only the "main" word from the phrase takes the -n ending.
Why? It leaves space for turning other words inside the already-accusative phrase into accusative case! If you added -n to the whole phrase, it would not only be too confusing (it could be a very long phrase!), but it would also stop you from marking other stuff inside it as accusative again. :)
I'm glad that someone asked this question and that you answered it but I can't fully understand your answer.
Yet, I will accept this like a rule of math and not ask questions but to just accept it do it - so only the first word will get the "n" ;)
Isn't the following rule allways working: words introduced by a preposition never get the -n?
Yes, with an exception. Prepositional phrases do get -n added on if indicating movement. For example:
en la domo - in the house; en la domon - into the house
sur la tablo - on the table; sur la tablon - onto the table
That's the way I understand it. So far, to my knowledge, only the object of the sentence (in English terms) gets the -n. so prepositional phrases aren't technically the object.
There are quite a few sentences without sound throughout the course, as far as I've noticed. I'm pretty sure they are planning to add them later. Remember that all the sentences were recorded by hand, unlike other courses!
Dankon! That explains why it sounds so nice, and why there's no sound when hovering over a single word.
yeah. In my mind, all the courses that don't have actual people's voices for their audio should go and record some. I'd just love that.
True. I use to learn a lot of languages on Duolingo then I quit the courses since the computer voice is hard to understand.
Not that it's a great replacement, but Google Translate's TTS Esperanto does a decent enough job if you really need to hear how something sounds. (Though it doesn't hold a candle to the voice)
Wouldn't this be "fromagxon kun vinon"? Correct me if I'm wrong but currently it sounds like "We and wine like cheese"
Lazar95 has a great explanation higher up in this thread, but here's a short version in case you missed it. 1. Only the "main noun" in an Accusative phrase takes the -n. This allows for further use of the Accusative case, nested within the main Accusative phrase. 2. "Kun" would trigger the Instrumental case, if Esperanto had such a thing. As such, "vino" does not require the Accusative -n.