China has blocked Wikipedia to varying degrees over the years, but now that censorship appears to be farther-reaching. A recent Open Observatory of Network Interference report has shown that China started blocking Wikipedia in all languages sometime in April, not just the Chinese-language version as has been the case since 2015. The Wikimedia Foundation told AFP that it hadn’t received any notices regarding the block.

It’s not certain exactly why China decided to block other languages, but the move comes just weeks before the 30th anniversary of the Tiananmen Square protests, which culminated in a violent government crackdown.

China typically blocks access to specific web pages referencing the tragedy, but it can’t do that on Wikipedia after the site switched to HTTPS and made it effectively impossible for censors to see the individual pages people are viewing. A blanket ban would be the only way to prevent people from reading content, especially since translation is readily available.

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