Work on Windows 10 continues and Microsoft has recently completed development of a new testing build that has reportedly been spotted online, most likely as the company shipped it to partners and private testers.

Windows 10 build 9860, which is still part of the preview development stage, appears to be available in more languages than its predecessors, including Korean and Arabic. Other changes are yet to be disclosed, as this version is available only to a very limited group of testers.