There are parts of south america where vosotros is used, but I think what the parent was getting at is that it is not technically considered a 'tense', but rather a 'person' as in e.g. 'third person'

In Colombia, the use of 'vos' means the person is from the region where sugarcane is cultivated, or the cities around.

That means Cali, Buenaventura and some others.

Yes, that's why I said "because of vosotros" in my post.

I thought it was used in Argentina at least?