My fw version is 4.1.0. I bought my switch here in dubai so as far as I know switches here are EUR
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I fixed that a while ago thanks to one of my friends in the dev channel. Anyways this should fix the version and the error code displayed for setGetLanguage(): https://cdn.discordapp.com/attachments/287345711492628490/446721786235584513/SwitchIdent.nro
Other things to note:
I'm unsure if the the GetRegion works like that, so it's most likely not accurate. Also, IP address won't work. While the language may it return an error code I was told it returns and empty string. I'll need more people from other regions to confirm if GetRegion is accurate.