All these comments are very informative, but we're straying from the topic. The question is not whether we should deliberately exclude minority languages or cultures, but whether we should consider the preservation of cultures and languages part of the Foundation mission. If we don't consider something a goal, that does not mean we work *against* it. For example, our goal is not to promote human rights or prevent child soldiery, even though our work benefits those causes.
Should the Foundation be willing to allocate donated funds and resources to that purpose? What is the mission of the Wikimedia Foundation itself (not of the individual users, who have their own causes and motives)?