Hello! I created an application that creates resource pack for Minecraft Pocket Edition with translations downloaded from Minecraft (PC) repository.
Currently it contains about 93 languages including funny translations: Upside down, Pirate language and LOLCAT.
These translations made by community on Crowdin site and I think these translations are better and more accurate than current translation included into Minecraft Pocket Edition.
Unfortunately we can't obtain full translation pack for most languages. Because MCPE contain text that did not included in Minecraft (PC), but I think this translation is useful because main part - items, blocks, in-game messages will be translated.