How to change Backend-Language?

Hi!
Some of my Piwik users want to access the Piwik backend and want to change the language, because the want to export some data in language A and others in language B (lets say for collegues in other countries).

As far as I understand, Piwik uses the language-settings of the browser or GeoIP to detect the best language.
But is there an option to have a dropdown-box and select the desired language in the backend / user-settings?

Argh,
just found that dropdrop in the upper right menubar…
Sorry for this unneccessary post…