STOCKHOLM — It was a radical experiment in free speech, even for Sweden: Give ordinary and not-so-ordinary people the chance to be, more or less, the official voice of a nation. After seven years of Twitter posts on topics as varied as manga comics, ugly sweaters and the dangers of prescription drugs, Sweden is calling it quits.

Since 2011, control of the Twitter account @sweden has been handed to a different person each week, allowing the curators to tweet about almost anything they please. At the end of September, after 356 curators and more than 200,000 tweets, the experiment will end.

The messages, largely in English, have ranged from didactic to deeply personal, polite to racy. Along the way, @sweden has provoked heads of state, stirred controversy, got laughs, earned 147,000 followers and even drew some imitators.

Finland and Ukraine began @peopleoffinland and @Ukraine. The late-night TV host Stephen Colbert even tried to become a curator for @sweden, but not being Swedish, he did not qualify.