I made a german TTS soundpack, now we have Windows 10 and I didn't find any way to enable an english speaker on a german Windows version.
It is based on this soundpack:
Shortened TTS and clean sounds
Made by Adam 'ZilexuS' Strandberg

My only contribution is to translate his soundpack to german, so we don't have such an extremely german reading of an english TTS soundpack.

http://www.wombaz.de/uploads/2015/08....ts3_soundpack

I would very much like to upload it to the addons website or as attach to this forum, but unfortunately the former still has no upload function, and the latter blocks the upload as either forbidden or attachment too big.