Something that Android Wear 1.x was sorely missing was support for on-screen keyboards. It just isn’t ideal in some circumstances to have to talk to your watch. Naturally, one of the features people got most excited for in Wear 2.0 was the ability to type using a keyboard. However, it appears that some languages’ keyboards have some missing characters.
There are two reports of this happening on the Google Product Forums’ Android Wear Help Forum: one with the Russian keyboard, and one with the Hungarian keyboard.
Fail: Android Wear 2.0’s Russian and Hungarian keyboards are missing letters, but a fix is coming soon was written by the awesome team at Android Police.