[schoen]

There's also Brazilian Portuguese "né", which is an end-of-sentence tag with exactly the same meaning. It's a contraction of "não é" ('isn't it') and is used in a way akin to German "nicht wahr".

[Yen]

Which, incidentally, is almost certainly where the usage in Ender's Game comes from.

The author (http://en.wikipedia.org/wiki/Orson_Scott_Card) spent two years in Brazil on a religious mission, and there's multiple other Portuguese references in that book.

(This influence is even stronger in "Ender's Game"'s sequel, "Speaker for the Dead")

[weinzierl]

Also "isso" which in German is colloquial for "Ist so" and means "That's it" or "Exactly". When in Brazil I always found it funny that they use "isso", short for "isso mesmo", in much the same way.

[schoen]

It's funny to think that the conversation fragment

- ... Né?

- Isso.

could happen in either Brazil or Germany with the same meaning. :-)

[kevin_thibedeau]

Could this have been influenced by the Japanese colonists in the São Paulo region?