On English Wikipedia, the tilt is not exactly "left." It's generally more "liberal" (in the American sense). The group of editors that controls American politics articles pretty clearly isn't feeling the Bern, for example.

But this is highly dependent on the topic area. Some pages are controlled by relatively right-wing pro-Israeli editors, others are controlled by pro-Palestinian editors (and many are caught in the tug-of-war between these groups). Different groups control different topic areas, and some of those groups can be extremely right-wing.