diff --git a/src/locale/messages.en.json b/src/locale/messages.en.json
index f685685d71c09cbe4846bd130c98101e9beb0ba7..8073f20da4f48c9d2367295766a81920abad3679 100644
--- a/src/locale/messages.en.json
+++ b/src/locale/messages.en.json
@@ -8,7 +8,7 @@
     "ERROR_DICHO_TARGET_TOO_HIGH": "Dichotomy: the solution %targetSymbol%=%targetValue% is greater than the maximum computable value %targetSymbol%(%variableSymbol%=%variableExtremeValue%)=%extremeTarget%)",
     "ERROR_DICHO_TARGET_TOO_LOW": "Dichotomy: the solution %targetSymbol%=%targetValue%  is lower than the minimum computable value %targetSymbol%(%variableSymbol%=%variableExtremeValue%)=%extremeTarget%)",
     "ERROR_ELEVATION_ZI_LOWER_THAN_Z2": "Upstream elevation is lower than downstream elevation",
-    "ERROR_INTERVAL_OUTSIDE": "Interval: value %value% is outside of %interval",
+    "ERROR_INTERVAL_OUTSIDE": "Interval: value %value% is outside of %interval%",
     "ERROR_INTERVAL_UNDEF": "Interval: invalid 'undefined' value",
     "ERROR_INVALID_AT_POSITION": "Position %s:",
     "ERROR_LOADING_SESSION": "Unable to load session",
diff --git a/src/locale/messages.fr.json b/src/locale/messages.fr.json
index 03e07508e218a449144ce5e953a3fd9ef2f92555..2a210aaddcaa060bb5bb1a6f4b2152d8f0087edf 100644
--- a/src/locale/messages.fr.json
+++ b/src/locale/messages.fr.json
@@ -8,7 +8,7 @@
     "ERROR_DICHO_TARGET_TOO_HIGH": "Dichotomie : la solution %targetSymbol%=%targetValue% est supérieure à la valeur maximale calculable %targetSymbol%(%variableSymbol%=%variableExtremeValue%)=%extremeTarget%)",
     "ERROR_DICHO_TARGET_TOO_LOW": "Dichotomie : la solution %targetSymbol%=%targetValue% est inférieure à la valeur minimale calculable %targetSymbol%(%variableSymbol%=%variableExtremeValue%)=%extremeTarget%)",
     "ERROR_ELEVATION_ZI_LOWER_THAN_Z2": "La cote amont est plus basse que la cote aval",
-    "ERROR_INTERVAL_OUTSIDE": "Interval : la valeur %value% est hors de l'intervalle %interval",
+    "ERROR_INTERVAL_OUTSIDE": "Intervalle : la valeur %value% est hors de l'intervalle %interval%",
     "ERROR_INTERVAL_UNDEF": "Interval : valeur 'undefined' incorrecte",
     "ERROR_INVALID_AT_POSITION": "Position %s :",
     "ERROR_LOADING_SESSION": "Impossible de charger la session",