The ten most controversial (i.e. most prone to edit wars) articles in the English, German, French, Spanish Czech, Hungarian, Romanian, Arabic, Farsi, and Hebrew language Wikipedias:
|Source: Taha Yasseri1, Anselm Spoerri, Mark Graham1, and János Kertész. "The most controversial topics in Wikipedia: A multilingual and geographical analysis" Upcoming chapter in Global Wikipedia: International and cross-cultural issues in online collaboration. (Scarecrow Press, 2014).|
Notice that half of the ten most controversial Spanish-language articles are about football!