Croatian Wikipedia was used to deliberately and succesfully instill nationalist and neo-fascist points of view onto the users of the page, young people in Croatia. The really odd thing is that literally 4 Wikipedias were started in the Serbo-Croatian language: the Serbo-Croatian Wikipedia, the Serbian Wikipedia, the Croatian Wikipedia, and the Bosnian Wikipedia. The Croatian one is often the most biased one.
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I often read the English and the German Wikipedias. I found that I can edit the English Wikipedia and my changes are accepted, my changes on the German Wikipedia however are rejected.
The English Wikipedia is up-to-date. In topics such as computers or science or popular culture, it is very accurate. The German Wikipedia feels to me like stuck in 2006. Many pages don’t have any of the recent developments, and the information is very outdated.
If I read history, English and German Wikipedias present completely different articles, where the German one tends to be better and unbiased. Only in these topics (history and the like) the easy editability of the English Wikipedia makes it a target and victim of misinformation and bias.