Americans do this shit all the time. US latinos are some of the worst offenders. My relatives in the US will talk all day about how "latino" they are while acting very American every time they come visit us. Their Spanish is also a weird blend of Google Translate and American slang.

Even the ethnic enclaves I met in NYC either talk and behave like old men or are very American with some remnants of our culture. The only ones who could pass as being a native of my country were the children of immigrants. Sometimes.