I (well, actually my robot) have gone through the English Wikipedia and searched for pages with Interwiki links. The result can be found on [[Meta:Common Interwiki links]]. It contains a list with the pages with most interwiki links (repeated below), but also for the most commons Wikipedia languages a list of the pages with most interwiki links that do NOT have an interwiki link to that specific language. These might thus be subjects that are 'missing' in that language (or they might be there but unlinked...). Here the list of 100 pages with most interwiki links. To not overcrowd the list with years and dates, this list (as well as the others) is restricted to at most 10 years and at most 5 dates. First are shown the number of interwiki links, then the title of the page. Thus [[Mathematics]] is the English page with most interwiki links, having 63 of them, followed by 61 for [[Biology]] and 60 for [[Chemistry]].

Andre Engels

63 Mathematics 61 Biology 60 Chemistry 59 2004 59 Astronomy 59 Geography 59 Germany 57 United States 55 Physics 54 France 54 May 53 2003 53 Esperanto 53 Europe 53 Internet 53 March 53 Philosophy 53 Religion 52 June 51 January 51 Literature 51 Music 50 European Union 50 February 50 Language 50 September 50 Wikipedia 49 April 49 August 49 English language 49 January 1 49 October 48 Computer 48 Japan 48 List of historical anniversaries 48 November 48 Spain 47 2001 47 2002 47 May 1 47 Sport 46 1991 46 December 46 History 46 January 4 46 List of sovereign states 46 United Kingdom 45 1941 45 1945 45 1989 45 1994 45 Earth 45 January 2 45 January 3 44 1924 44 Belgium 44 Greece 44 Switzerland 43 Canada 43 Mars (planet) 43 Poland 43 Psychology 43 Sociology 42 Denmark 42 GNU 42 Italy 42 Western philosophy 41 Algeria 41 Christianity 41 Computer science 41 Economics 41 Periodic table 40 Africa 40 Archaeology 40 Continent 40 Estonia 40 Hungary 40 Portugal 40 Sun 39 Albania 39 Australia 39 Euro 39 Iraq 39 Russia 38 19th century 38 Architecture 38 Asia 38 Atom 38 Austria 38 Czech Republic 38 Egypt 38 Football (soccer) 38 Gangnihessou 38 Isaac Newton 38 Netherlands 38 Operating system 38 Solar system 37 Encyclopedia 37 Geology 37 Gregorian calendar 37 Hydrogen 37 India 37 Linguistics 37 Romania 37 Wiki 37 World War II