Has Brazilian Portuguese been separated from European Portuguese and become another independent language?

Answer 1

They are not independent, the grammatical basis is the same with minimal differences. However, there is a linguistic issue that differentiates them due to the cultural influences that each location receives. After all, the language is alive, and each place has its different context. This is what happens with the Portuguese spoken in Angola, Mozambique, Guinea-Bissau, etc. And to know the difference, textbooks usually indicate that in Portugal or Brazil there is a different way of using it, for example. Therefore, there are linguistic differences, not grammatical ones. Therefore, they cannot be considered independent.

Answer 2

Brazilian Portuguese and European Portuguese are not independent languages (although some believe they should be), but are different dialects. They are so different, however, that Portuguese textbooks explicitly point out the differences. In the textbook, a grammatical structure will be introduced and it will say, "In Brazilian Portuguese they do this, and in European Portuguese they do this." Additionally, one often specifies the dialect that they learned. I, for example, speak Brazilian Portuguese.