Hello Finn,
You have some sizable Finnish language speakers in Sweden:
Swedish {O}
sv
95.0%
99.0%
Finnish {OR} fi 2.2%
So if the similar query is executed on Finnish language, and the results also show some "undue" proportion of visits from Sweden, then what you observed as anomaly is the that unique. We probably need many iterations of comparative outcomes and normalization of data (Sweden does have higher population). Also, it might be handy to have some statistics on immigration or residence, it is EU. I will not be surprised that for example the visits from Oxford to Wikipedia website have sizable German language requests.
I am still a bit bothered by the number "1" in the current dataset. It does not feel right since the numbers of 1.4% and 0.6% is a notable difference in this regard. Perhaps we need some high precision "universal percentage" number for each territory-language pair. It would be also great to do another set of aggregation: i.e. given a territory, which language versions of Wikipedia are accessed....
Best,
han-teng liao