For example: I am a Dutch citizen. Due to the European Union I have the right to live and work in Iceland. If I were to move there, I'd gain the right to vote in local elections (not national ones, gotta be a citizen for that) - without speaking a word of Icelandic. I'd also have to do taxes, renew my driver's license, and all the other government stuff.
Either I and the thousands like me are going to use Google Translate and screw it up, or they'll just have one of the many bilingual workers provide an official translation. It makes a lot of sense to just translate all official government pages, making an exception for this specific page is probably more work than just translating it too.
I’d also assume Google Translate will do better translating from English to $OtherLanguage than Icelandic to $OtherLanguage. So makes sense to put up a translation into English (or other common language) and make sure it’s correct.
And man, I really wish someone who actually knew would weigh in on this.
[1]: https://en.wikipedia.org/wiki/Languages_of_Iceland [2]: https://en.wikipedia.org/wiki/Icelandic_language
However, it does have an "EN" button near the top right. Personally, I think this is as close to a perfect solution as you can get. (Geolocating an IP or something has a whole bunch of problems than just going with your country's official language as a default.)
Similarly, English is a standard language in India in part because of the linguistic diversity of the country¹ and being an outsider language means that communications in English don’t privilege any of the indigenous ethnic groups, although it seems that English usage has been dropping in favor of English.
⸻
1. English usage was supposed to have been phased out fifteen years after independence, but the mandated sunset was changed by constitutional amendment in 1963 (apparently a year after the sunset date(!)). India has 22 scheduled languages—i.e., languages receiving constitutional recognition and encouragement—but there are 122 major languages with more than 10,000 speakers. I think India wins the prize for the greatest linguistic diversity among the nations of the world.
This crutch of using English in Iceland not only discourages (and actively prevents) newcomers from learning Icelandic, but it also creates a paradoxical reliance on a language that most immigrants do not speak prior to their arrival. This creates challenges, particularly hindering integration, as Icelandic is (for the time being) still required in most aspects of society. It also threatens the preservation of our language, which is only spoken by around three hundred thousand people.
Jeg snakker norsk, men det er alikevel vanskelig å forstå islandsk!
But to answer the question, I personally lean towards discouraging English as the default second language and instead focus on strengthening Icelandic. Encouraging everyone to communicate in the native tongue, regardless of proficiency level, can be very effective. That was certainly my experience when my family and I moved to Catalonia.
Norskan er auðlesin, en ég á erfiðara með að skilja talmál!