How Slavic is Manitoba?

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There is also a correlation with lakes - Manitoba has huge lakes, just like Michigan and Wisconsin.

Apparently Slavic people like to settle near large water reservoirs. Ancestral instinct from Polesia?

The oldest "capital" (one of 3 most important strongholds) of Poland was also in an island on a lake:

I know the Icelandic diaspora is settled on the banks of Lake Winnipeg, known as New Iceland. But I am not sure about the Slavic populations.