Does a hard reset on 10419 delete keyboard languages like 10326

[asianfu]

Yesterday at night, my battery drained from 100 to 22... I wanna try a hard reset but am not sure m languages will be deleted or not amd I will not be able to get them back. is it correct pr

 

[Zachary Boddy]

A hard reset restores everything to factory defaults. Including the keyboard settings. You will lose all data and everything you put on the phone. It is possible to restore the data through a backup, but I doubt a backup will include your languages.
The battery life is just a matter of poor optimization in a technical preview. A hard reset probably won't help much on that front. Optimization will come with time.