There are some special messages that appear in the POT and PO:
This is for translator’s notes that are injected in the resulting translation. See The Special Slot for Translator’s Notes, for more information. If your translation does not have notes, you must translate this as a space:
msgid "*GNUN-SLOT: TRANSLATOR'S NOTES*" msgstr " "
This is again optional, and should contain the name (and address) of the person who made the translation. “Translate” this string as a space if you do not want your name to appear there. See The Special Slot for Translator’s Credits.