Anywhere else: Arabic (Mid East/Africa), Chinese (Asia), Spanish (South America).
[1]: https://www.economist.com/news/europe/21721861-despite-jean-...
Population of South America: 421M¹
Population of Brazil: 208M²
It would look like the current EU Hacker News: nonexistent.
Despite having, relatively speaking, [some islands of] fairly decent English education, EU doesn't have broad native-level English literacy. The level of discussions in English is fairly low, and people are not as likely to recognize or casually learn cross-disciplinary jargon like full time English speakers.
It's relatively straightforward for a native English speaker to enter into discussions at the level of HN, but for somebody who does not use English absolutely every day in every function of daily life, it'll be a chore.
While lots of professionals speak English more or less well, what is telling to me and a big indicator that the situation does not look as good as some people want to believe is the fact that there is hardly any English-language cinema or movies/series (on TV).
Even where I am, a major German city, there is the one huge cinema complex (10 cinemas) that only shows 2 or 3 English language movies - in their smallest rooms and with less than 10% of seats taken. Every single movie and TV series gets German speakers for this market.
I can't say how reliable of an indicator this is, but I think given that this stuff (TV and cinema) still is a huge part of daily mass entertainment the fact that those offering the (often originally US-made) material choose to spend a lot of effort creating a German voice track pretty much without exception probably is significant.
You also see this in book translations. Here in Denmark, the choice is sometimes rather limited (outside of bestsellers) and the translation quality suffers. Compare this to Germany, where the market is significantly larger, so more more and higher quality translations are available.
I'm Danish and my girlfriend is German, and I definitely notice the difference whenever I visit her family in Baden-Württemberg.
I also noticed it while I was studying. Technical documentation was usually only available in English and German. When you have a population of >80 million people, there is a large incentive for producing native language products.
As a consequence, a lot of Germans over a certain age simply do not speak English very well, or at all.
[0]: https://www.wolframalpha.com/input/?i=Population+of+Norway+%...
Source: I feel quite at home commenting here, but I'm a mumbling wreckage when navigating the day to day linguistic perils of e.g. something as trivial as a US supermarket checkout.
Yeah, I think that's a fairly common issue (overspecialization). I have that problem with studying Japanese: I get most of my practice in listening, so I can listen to and understand at a level far above my speaking, reading, or writing.
I also can’t read a lot of regular prose very well. I can read any technical subject quite well though.
To be fair I was shocked when visiting the US how bad many Americans are at formulating themselves on paper.
The thing about English is that it's such a clusterfuck; slang, contractions, and "incorrect" grammar are hard to criticize when the language is already such a mess. Partly in jest, I liken it to a linguistic Broken Windows Theory[0].
Honestly, it might be interesting if there were a central, yet multilingual, place where tech-oriented Europeans could congregate just to see what would happen.
Of course the subset of the population that is likely to end up on "European Hacker News" would mostly consist of at least part-time English speakers. But then what is going to keep non-European English speakers out of that forum?
I don't think HN would look any different if it were hosted in Europe. Any website with mostly English content is going to be dominated by visitors from the US.
I speak English fairly well, but most people here just understand it when spoken to them, they can't speak it fluently.
But in the BeNeLux or Scandinavian countries people speak english rather fluently, even if they don't need it at their jobs.