Here are some key stats from their study:
The US accounts for less than half of all mentions on Twitter (41 percent).
English is the most used language for Twitter mentions, coming in second in most countries that speak another language abroad.
In Europe, mentions start to ramp up as early as 5am. After a peak at 10am, they’re stable during the afternoon, and start to fall off around 3pm.
See rest of the findings in this visual:
Click image to enlarge
Things to learn from this research:
Monitor where your audience is tweeting from. You may be surprised by the geographic diversity represented.
Consider every time zone. Schedule posts for your entire audience (especially on weekends) via tools like Buffer and Hootsuite.
Diversify your tone. Don't be afraid to post in different languages, or to comment on "local" events or interests. Local is now Global.