Hello @hugolennon.
You did not mention any Operating systems, but i assume a Windows driven device. Windows uses its own “Locations Service”, this one is probably causing some issues.
Hope the above information could give you somehow some guidance, to find the root cause of the incorrect location report.
Thanks @Pieter_B ! I actually only have Apple devices, can you still help me? :)
Thank you for these! I had a look at those and None really help...I truly think it is a network related issue as all devices when connected to the WiFi show as being in the USA, i.e. for when I use google maps or search results on Google.
Is there an IP issue? or DNS configuration?
Well i could not find so much more on your problem, but like i was saying, looks like more Apple users have the same issue now and then.
Did you try a factory reset of the router already, just in case to see if anything changes.