Gabe Aul has announced that Language Packs and Keyboards can now be downloaded in Windows 10 Mobile build 10536.1004, which was released on Monday.
Getting language support for keyboards and Cortana on Windows 10 Mobile has been a slow process, with region support for
Although Microsoft only announced the availability of the language packs and keyboards two hours ago, it may take a while to show up, as at least one Windows Insider has already pointed out.