:WTF! What is this Siberian language? Is this some kind of POV fork of the Russian language Wikipedia? 
 :On the issue itself: This is the English language Wikipedia. It is not our job to judge the merits or the weaknesses of the RU-SIB Wikipedia. A group of people, however ignorant and biased thay may be, they have managed to elevate their dialect to the status of a Wiki-language and to start to Wikipedia in their dialect/language. Now that they have created an article on Ingria, they have EVERY RIGHT to create a interwiki link here. If their article is crap, it is their business, not ours. (Everyone of course has the right to learn the language and contribute to the ru-sib wikiledia -)