diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8
index 06e5c4f2b5c3ed572957dc2383a8919537486433..6b1408b4192fc1a654f534e16a512740fe39dd4b 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8
@@ -25,7 +25,7 @@ EMPTY_TILE = tile is empty: {0} ⨉ {1}
 # unknown sensor {0}
 UNKNOWN_SENSOR = unknown sensor {0}
 
-#unknown pixel in mapping {0}
+# unknown pixel in mapping {0}
 UNKNOWN_PIXEL = unknown pixel in mapping {0}
 
 # line-of-sight does not reach ground
@@ -86,10 +86,10 @@ NO_REFERENCE_MAPPINGS = no reference mappings for parameters estimation
 DUPLICATED_PARAMETER_NAME = a different parameter with name {0} already exists
 
 # rugged name is not found 
-INVALID_RUGGED_NAME = invalid rugged name.
+INVALID_RUGGED_NAME = invalid Rugged name
 
 # refining context is only handled for limited number of configurations
-UNSUPPORTED_REFINING_CONTEXT = refining using {0} rugged instance is not handled.
+UNSUPPORTED_REFINING_CONTEXT = refining using {0} rugged instance is not handled
 
 # no atmospheric layer data at altitude {0} (lowest altitude: {1})
-NO_LAYER_DATA = no atmospheric layer data at altitude {0} (lowest altitude: {1})
\ No newline at end of file
+NO_LAYER_DATA = no atmospheric layer data at altitude {0} (lowest altitude: {1})
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8
index a11b29b1eef27c5cc022a54bd299cb28200723e8..8cd8d4ae191dc3333d1bd908983e6eb6d57f30f5 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8
@@ -25,8 +25,8 @@ EMPTY_TILE = la tuile est vide : {0} ⨉ {1}
 # unknown sensor {0}
 UNKNOWN_SENSOR = capteur {0} inconnu
 
-#unknown pixel in mapping {0}
-UNKNOWN_PIXEL = <MISSING TRANSLATION>
+# unknown pixel in mapping {0}
+UNKNOWN_PIXEL = pixel inconnu dans le mapping {0}
 
 # line-of-sight does not reach ground
 LINE_OF_SIGHT_DOES_NOT_REACH_GROUND = la ligne de visée n''atteint pas le sol
@@ -86,10 +86,10 @@ NO_REFERENCE_MAPPINGS = aucune projection de référence pour l''estimation des
 DUPLICATED_PARAMETER_NAME = il existe déjà un autre paramètre nommé {0}
 
 # rugged name is not found 
-INVALID_RUGGED_NAME = <MISSING TRANSLATION>
+INVALID_RUGGED_NAME = nom invalide pour Rugged
 
 # refining context is only handled for limited number of configurations
-UNSUPPORTED_REFINING_CONTEXT = <MISSING TRANSLATION>
+UNSUPPORTED_REFINING_CONTEXT = le refining utilisant {0} rugged instances n''est pas traité
 
 # no atmospheric layer data at altitude {0} (lowest altitude: {1})
 NO_LAYER_DATA = pas de couche atmosphérique définie pour l''altitude {0} (altitude la plus basse : {1})