Browsing Vietnamese translation

Translators: This text is displayed in a message dialog when a user indicates
he/she wants to switch to a new user profile which will cause him/her to lose
settings which have been altered but not yet saved. A "user profile" is a
collection of settings which apply to a given task such as a "Spanish" profile
which would use Spanish text-to-speech and Spanish braille and selected when
reading Spanish content.