Wrong flag for visitors

Hello everyone !
I just installed Piwik and I was surprised to see the first results : 2 connections from France (with french flag), which actually designated my 2 test visits from Canada, with a canadian ISP. style_emoticons/<#EMO_DIR#>/huh.gif
Well, my browsers are in french, maybe that explain why ? But hte thing is France is not the only place where people speak french style_emoticons/<#EMO_DIR#>/tongue.gif
I have attached a screenshot, showing the visitors details page, with 2 visits from France and those 2 visits coming from acanac.net, an ISP located in Ontario
If you want more details, just answer me, we ll try to work something out !

See FAQ at http://piwik.org/faq/troubleshooting/#faq_65