With a non-english language, item names in /give are not changed.

When you have a different language setting from English, English names are still used in /give. By this, I mean that if you have Klingon chosen as your language, you cannot say give @p minecraft:nagh. You need to use /give @p minecraft:stone. This does not make any sense.
See http://www.youtube.com/watch?v=vk0IDfc3eSg