Funny side-note: Sweden never registered Swedish as an official language to the EU because they thought it would be a waste of EU funds to translate all documents to Swedish, since most people there can get along in English.
Then Finland went ahead and ruined it by registering both Finish and Swedish as their official languages (they have a Swedish minority there) :)
It’s a good story, but Finland and Sweden joined EU at the same time in 1995, so there wouldn’t actually have been a period when Sweden was a member but Swedish wasn’t an official language.
Of course the Swedes would like to blame things on Finland if they can ;)
Then Finland went ahead and ruined it by registering both Finish and Swedish as their official languages (they have a Swedish minority there) :)