I think you've got the story behind it right. The writer probably would never say something else like "Wien -- Vienna in the language of English...".

That language would be "akkadiska" in Swedish. I hesitate before "the language of Akkad" or "...of the Akkadians". I find it difficult to identify any "Akkadians", and prefer to make a distinction between Assyrian and Babylonian for post-2000 BCE Mesopotamian languages. The Akkadian of 2400-2100 BCE is a language, and I can't link it to any ethnic group.

Sounds fine to me, if a little poetic. I'd say it. I'd also say "the language of English," but I think I might be more inclined to say it this way if the language was unfamiliar, er, say, "the language of Ku." (I grew up in the UK.)

"The language of Akkadian" sounds wrong; OTOH, "the sport of football" sounds right. I think the former is not idiomatic.

In any case, isn't that language usually referred to as Cajun?

In any case, isn't that language usually referred to as Cajun?

Eh la-bas! We have a winner!

I believe that Cajun is one of the languages of the Dravidian diaspora. The words "gumbo" and "zydeco" have close cognates in both Tamil and Telegu.

I am not inclined to accept the phrase "language of Akkadian", for it sounds completely wrong. To me only "the language of Shumer û Akkadê" sounds right and proper.

To me it is not something you would utter in casual discourse, and would probably be frowned upon as somewhat overly literary, but is still permissable.
The other account could still be correct, of course.

I think your explanation is correct, but I didn't notice the phrase on first reading. It seems strange, but not necessarily ungrammatical, since it can fit into the pattern of "the game of chess", "the state of Maryland", or "the subject of mathematics".

It's odd, but I'm inclined to accept it.

I googled the analogous phrase "language of english" and got over 26,000 hits. Many, perhaps most, aren't really applicable, being stuff like "the language of English literature" but some of them are. The third hit is from the BBC, with "The idea for a programme about the language of English came from..." If the BBC says it, it must be grammatical, right?

See here for a use of "the language of Hopi".

OK, on the one hand, that's not a genuine occurrence of the construction because it's just there to continue a running joke about "a language of hope." On the other hand, that's a damn funny skit, and I'm going to have to blog it. So, thanks!

I get the same reading as Gillian, Robert, and KC: high-register, but maybe faux-ly. There was a similar discussion I-forget-where after the announcement of Benedict XVI's election: Cardinal Estevez clearly said qui sibi nomen imposuit Benedicti (Decimi Sexti) for the expected agreeing -um -um -um, which is how the announcement was published on the Vatican website.