I am not sure if this thing belong here, this issue may be with mods themselves, but i noticed that when 2 mods define the same name in their lang file for item/block one name will overwrite the other.
example:
Bigreactors define tile.multiblockGlass.0.name=Reactor Glass
EnderTech define tile.multiblockGlass.0.name=Ender Tank Glass
in game both blocks have "Ender Tank Glass" name, since EnderTech loaded after BigReactors.
Is this something fixable in languageRegistry or should i report this to mod authors?
