The 15 billionth Twitter post was sent over the weekend of May 29 and 30, just a few months after the social networking site passed the 10 billion message mark.

According to social media and marketing blog The Wall, it has taken about 12 weeks for the those five billion new Tweets to be posted. It suggests that the speed of the achievement is due to Twitter users becoming more active – although it does sound a note of scepticism about the proportion of spam messages.

Blog post author Gordon MacMillan said: “I’ve certainly noticed more and more people on Twitter – a lot since the election in the UK particularly.”

Twitter itself only last month claimed it had 105 milion users, although there were no statistics to show what proportion of this number was active.

And a major revamp of the site was unveiled last week, allowing Spanish, French, German and Italian speakers to access help pages in their native tongue. The site’s help pages now contain answers to every question the site claims it has ever received.

As @crystal promised in the post announcing the latest update: “This is just the first round of improvements… Stay tuned for even more improvement in the upcoming months.”