today i run in the self problem, my SkyrimEditor.ini was change but i have not know that i must add here my sLanguage too. Thanks @marafon514 ^^ and all other here for the help ! Ok here my settings now for GERMAN : in your Skyrim.ini must be :
[General]
sLanguage=GERMANAdd in SkyrimEditor.ini this :
[General]
sLanguage=GERMAN
bAllowMultipleMasterFiles=1
bAllowMultipleMasterLoads=1
...
[Archive]
bInvalidateOlderFiles=1
SArchiveList=Skyrim - Textures.bsa, Skyrim - Meshes.bsa, Skyrim - Animations.bsa, Skyrim - Voices.bsa, Skyrim - Interface.bsa, Skyrim - Misc.bsa, Skyrim - Sounds.bsa, Skyrim - VoicesExtra.bsa, Skyrim - Shaders.bsa, Update.bsa, Dawnguard.bsa, Dragonborn.bsa
SInvalidationFile=ArchiveInvalidation.txt
iRetainFilenameOffsetTable=1
iRetainFilenameStringTable=1
iRetainDirectoryStringTable=1
bCheckRuntimeCollisions=0
bUseArchives=1
SResourceArchiveList=Skyrim - Textures.bsa, Skyrim - Meshes.bsa, Skyrim - Animations.bsa, Skyrim - Voices.bsa, Skyrim - Interface.bsa, Skyrim - Misc.bsa, Skyrim - Sounds.bsa, Skyrim - VoicesExtra.bsa, Update.bsa, Dawnguard.bsa, Dragonborn.bsa
SResourceArchiveList2=Skyrim - Shaders.bsa, Update.bsa, Dawnguard.bsa, Hearthfires.bsa, Dragonborn.bsajust copy my [Archive] codeblock, the diffrence to the orginal SkyrimEdit.ini are the DLC Names. that is all what i have change in this .ini file. Now i can modding Dawngard, Dragonborn and Headfires - get sure you write Heathfires - not Heathfire without "s" ^^