You might have noticed that there is a FUZZY column in Rosetta. This is not a Rosetta feature; it is provided by gettext. If the fuzzy flag is active for a translation, it will not be included in the compiled message files. This flag marks translation strings that need to be reviewed by a translator. When .po files are updated with new translation strings, it is possible that some translation strings are automatically flagged as fuzzy. This happens when gettext finds some msgid that has been slightly modified. gettext pairs it with what it thinks was the old translation and flags it as fuzzy for review. The translator should then review fuzzy translations, remove the fuzzy flag, and compile the translation file again.