view and languages i18n

http://groups.drupal.org/node/47478#comment-771088

Do you have Entity Translation module installed?

1) No. Current user's language ("content language") is the same as the "interface language" which is determined by the interface language negotiation/detection settings.

2) Yes. Current user's language ("content language") is determined by the content language negotiation/detection settings (which may or may not be set to the same settings as the interface language negotiation/detection settings... depends on how you configure it).

Note that other modules may also choose to implement the "content language" behavior but currently only the Entity Translation module does so (AFAIK).