Don't use \n sequence inside Lisp strings needing translation...

... Because xgettext will just remove the \, not replace \n with newline.

That's consistent with Lisp reader behavior in this documentation:
http://www.lispworks.com/documentation/lw70/CLHS/Body/02_de.htm

The XLisp reader, which replaces \n with newline, is nonstandard.

So, to accommodate xgettext, use (format nil "...~%...") instead, or where
you can't do that in a $ header line, just make a line break inside the ""

There are a few "\n" left alone in sample-data-export.ny which are neither
in $ lines nor inside (_ "...")

plug-ins/SoundFinder.ny

@@ -5,7 +5,10 @@
 $name (_"Sound Finder")
 ;manpage "Sound_Finder"
 $action (_"Finding sound...")
-$info (_"Adds region labels for areas of sound according to the specified level\nand duration of surrounding silence. If too many labels are produced,\nincrease the silence level and duration; if too few are produced,\nreduce the level and duration.")
+$info (_"Adds region labels for areas of sound according to the specified level
+and duration of surrounding silence. If too many labels are produced,
+increase the silence level and duration; if too few are produced,
+reduce the level and duration.")
 $author (_"Jeremy R. Brown")
 $copyright (_"Released under terms of the GNU General Public License version 2")
 
@@ -149,7 +152,7 @@ s-in))
 ;If no sound markers were found, return a message
 ;Otherwise, if some sounds were found, also optionally place a label at the end of the file.
 (if (null l)
- (setq l (_"No sounds found. Try reducing the silence\nlevel and minimum silence duration."))
+ (setq l (format nil (_"No sounds found. Try reducing the silence~%level and minimum silence duration.")))
  (if (= finallabel 1) (add-label (/ s1-length s1-srate) (/ s1-length s1-srate) (_"[End]")))
 )
 l