Amount of global traffic for the Facebook Messenger voice function originating in Cambodia in 2018, according to the company’s internal data.
The company wasn’t able to figure out why this relatively small country was racking up so much voice message time, but a subsequent investigation determined this usage is related to the local Khmer language and how ill-supported it tends to be on smartphone keyboards.
Unicode added Khmer script to their library in the early 2000s, but phone-based keyboards made using the language tedious, and the better keyboards that came along later weren’t pre-installed on phones.
Thus, voice messages became the “texting” default in Cambodia and Facebook’s free app became one of the main means of sending such notes.
—Rest of World