I once tried to identify the language in (supposedly) English-language Facebook posts. The second-most frequent language was Estonian. Looking at actual posts c

I once tried to identify the language in (supposedly) English-language Facebook posts. The second-most frequent language was Estonian. Looking at actual posts classified as Estonian, it turned out they contained text like "Soooooo nice". Because the language identifier looks at character sequences, and Estonian tends to have unusually common double vowels, such posts were classified as Estonian. Dutch and Norwegian were other two languages for which English was mistaken - apparently some character sequencies there have frequency distributions that are similar to English.