I can use handwriting for only one language: English (United States). It is the Windows Display Language. However, I can't change the Windows Display Language (tried many different ways).
No Language Options (including handwriting) for other languages, and no way to download other language packs.
I suspect the two issues are related, but I've no idea whether the inability to change the Display Language is causing the lack of language options, or the inability to download the language packs (no language options) is preventing the change of Display Language.
Just realised that this thread is binned under Surface Pro 4. I'm using ASUS Transformer 3 Pro so this is likely a Windows 10 issue rather than a Surface issue.