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because is the same language, but with a "local flavour". So I think
we should stick to 639-1.

However, I can assure you that are significant differences between pt
and pt_br to warrant two versions. Not that one cannot understand the
other, but it is a bit uncomfortable.... I think is almost the same as
with german and swiss german.

When we happen to have a (proper) portuguese version, then we should
think on how to deal with this variants.

-- 
Paulo Marcondes
zpaulomarcondesz at gmail period comz
my email has no z