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The reason beeing simply that the more complex the Algo, the more it is focussed on filters and stuff that only work for certain languages.
I would say yes, but mainly due to the amount of pages in English, compared to foreign languages.
A good part of the success in Google's algo is due to the fact that other "independant" votes (links from external sites/pages) weigh in the algorithm for ranking.
Take the Dutch language, it could be very likely that for certain "search terms" only 20 pages turn up in the Google results. It could be also very likely that all 20 of these pages have no external inbound links. Therefore, there results could be less refined or accurate, quality wise then the same search query in English where there might be a twentyfold of search results, with more exteranal votes.
I focus on the German language, but am based in Switzerland, where you get the odd Swiss German words. For the Swiss Terms, you get little competition.
However, it is als very hard to get good inbound links. There are very few Swiss Pages with high PR, because we are limited to our area. So a PR6 for a Swiss Website is already quite an achievement! :-)
The downturn is, that some very lousy, spammy sites will still rank high, because inbound links are less important
Conclusion: Less popular language - Great for Spamming!