Us Germans have some trouble with your "Umlaut" translation

magmi/ReleaseNotes.txt

@@ -20,3 +20,4 @@ The package now includes all plugins.
 
 Seem to work ok with magento 1.8 & 1.9 unless proven otherwise.
 
+Change

magmi/inc/magmi_utils.php

@@ -136,14 +136,14 @@ class Slugger
 {
     // Mapping array for intl accented chars
     protected static $_translit = array('Š'=>'S','š'=>'s','ś'=>'s','Ś'=>'S','Ð'=>'Dj','Ž'=>'Z','ž'=>'z','ż'=>'z',
-        'Ż'=>'Z','ź'=>'z','Ź'=>'Z','À'=>'A','Á'=>'A','Â'=>'A','Ã'=>'A','Ä'=>'A','Å'=>'A','Æ'=>'A','ą'=>'a','Ą'=>'A',
+        'Ż'=>'Z','ź'=>'z','Ź'=>'Z','À'=>'A','Á'=>'A','Â'=>'A','Ã'=>'A','Ä'=>'Ae','Å'=>'A','Æ'=>'A','ą'=>'a','Ą'=>'A',
         'Ç'=>'C','ć'=> 'c','Ć'=>'C','È'=>'E','É'=>'E','Ê'=>'E','Ë'=>'E','ę'=>'e','Ę'=>'E','Ì'=>'I','Í'=>'I','Î'=>'I',
-        'Ï'=>'I','Ñ'=>'N','ń'=>'n','Ń'=>'N','Ò'=>'O','Ó'=>'O','Ô'=>'O','Õ'=>'O','Ö'=>'O','Ø'=>'O','Ù'=>'U','Ú'=>'U',
-        'Û'=>'U','Ü'=>'U','Ý'=>'Y','Þ'=>'B','ß'=>'Ss','à'=>'a','á'=>'a','â'=>'a','ã'=>'a','ä'=>'a','å'=>'a','æ'=>'a',
+        'Ï'=>'I','Ñ'=>'N','ń'=>'n','Ń'=>'N','Ò'=>'O','Ó'=>'O','Ô'=>'O','Õ'=>'O','Ö'=>'Oe','Ø'=>'O','Ù'=>'U','Ú'=>'U',
+        'Û'=>'U','Ü'=>'Ue','Ý'=>'Y','Þ'=>'B','ß'=>'ss','à'=>'a','á'=>'a','â'=>'a','ã'=>'a','ä'=>'ae','å'=>'a','æ'=>'a',
         'ç'=>'c','è'=>'e','é'=>'e','ê'=>'e','ë'=>'e','ì'=>'i','í'=>'i','î'=>'i','ï'=>'i','ð'=>'o','ñ'=>'n','ò'=>'o',
-        'ó'=>'o','ô'=>'o','õ'=>'o','ö'=>'o','ø'=>'o','ù'=>'u','ú'=>'u','û'=>'u','ý'=>'y','þ'=>'b','ÿ'=>'y','ƒ'=>'f',
+        'ó'=>'o','ô'=>'o','õ'=>'o','ö'=>'oe','ø'=>'o','ù'=>'u','ú'=>'u','û'=>'u','ý'=>'y','þ'=>'b','ÿ'=>'y','ƒ'=>'f',
         'Č'=>'C','č'=>'c','Ľ'=>'L','ľ'=>'l','Ĺ'=>'L','ł'=>'l','Ł'=>'L','Ť'=>'T','ť'=>'t','Ň'=>'N','ň'=>'n','Ŕ'=>'R',
-        'ŕ'=>'r','Ř'=>'R','ř'=>'r','Ő'=>'O','ő'=>'o','Ű'=>'U','ű'=>'u','ı'=>'i', 'İ'=>'I', 'ü'=>'u', 'ş'=>'s', 'Ş'=>'S',
+        'ŕ'=>'r','Ř'=>'R','ř'=>'r','Ő'=>'O','ő'=>'o','Ű'=>'U','ű'=>'u','ı'=>'i', 'İ'=>'I', 'ü'=>'ue', 'ş'=>'s', 'Ş'=>'S',
          'ğ'=>'g', 'Ğ'=>'G');
 
     // Stripping accents