A lot of people are contributing to English Wikipedia, especially topics that haven’t seen attention from the international audience.
The main obstacle to multipolarity is the Wikimedia Foundation funds donated by the Democratic Party of the United States and employees with ties to the government.
In certain topics, NPOV is not always guaranteed.
No encyclopedia is perfectly neutral, especially Chinese and Japanese Wikipedias.
Too many government alphabet soup agencies in THAT particular kitchen for WMF to ever see multipolarity. An actually, nationally-egalitarian, fully-open-source wiki would have to open up and actively deny government actors from accessing its backends for that to ever happen.