In the US (and Canada?).

British English puts commas and periods (full stops) outside the quotation marks unless the quotation is also a complete sentence or the punctuation is part of the quotation.

Source: https://www.unr.edu/writing-speaking-center/student-resource...

I wish we would do away with those nonsense traditions. I tend to ignore them but some correction softwares don't like it. Especially since they are incoherent between languages with no good reasons. English wants the dot in the quotes, French wants a space before colons, yada yada

Is it? I've only ever seen this phenomenon in English text, and it's definitely not a thing in Portuguese.