PO files use the file format of the Gettext tools.
See also
# this is another comment
#. comment extracted from the source code
#: sourcefile.xxx:35
#, fuzzy
msgid "_: comment\n"
"translation"
Also know as KDE style comments as they are used by KDE for message disambiguation and comments to translators. (support for this is being phased out)
#~ msgid "Blah"
#~ msgstr "Bleeh"
#| msgid "previous message"
None