diff --git a/src/main/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverImpl.java b/src/main/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverImpl.java
index 299adadbc..8c260c665 100644
--- a/src/main/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverImpl.java
+++ b/src/main/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverImpl.java
@@ -137,15 +137,15 @@ public abstract class UnivariateRealSolverImpl
     }
 
     /** {@inheritDoc} */
-    public double solve(int maxEval, UnivariateRealFunction f, double min, double max)
+    public double solve(int maxEval, UnivariateRealFunction function, double min, double max)
         throws ConvergenceException, MathUserException {
-        throw new UnsupportedOperationException("Method not overriden");
+        throw MathRuntimeException.createUnsupportedOperationException(LocalizedFormats.NOT_OVERRIDEN);
     }
 
     /** {@inheritDoc} */
-    public double solve(int maxEval, UnivariateRealFunction f, double min, double max, double startValue)
+    public double solve(int maxEval, UnivariateRealFunction function, double min, double max, double startValue)
         throws ConvergenceException, MathUserException, IllegalArgumentException {
-        throw new UnsupportedOperationException("Method not overriden");
+        throw MathRuntimeException.createUnsupportedOperationException(LocalizedFormats.NOT_OVERRIDEN);
     }
 
     /**
diff --git a/src/main/java/org/apache/commons/math/exception/util/LocalizedFormats.java b/src/main/java/org/apache/commons/math/exception/util/LocalizedFormats.java
index 146aeb091..6cf536c7e 100644
--- a/src/main/java/org/apache/commons/math/exception/util/LocalizedFormats.java
+++ b/src/main/java/org/apache/commons/math/exception/util/LocalizedFormats.java
@@ -168,6 +168,7 @@ public enum LocalizedFormats implements Localizable {
     NOT_INCREASING_NUMBER_OF_POINTS("points {0} and {1} are not increasing ({2} > {3})"),
     NOT_INCREASING_SEQUENCE("points {3} and {2} are not increasing ({1} > {0})"), /* keep */
     NOT_MULTIPLICATION_COMPATIBLE_MATRICES("{0}x{1} and {2}x{3} matrices are not multiplication compatible"),
+    NOT_OVERRIDEN("method not overriden"),
     NOT_POSITIVE_ALPHA("alpha must be positive ({0})"),
     NOT_POSITIVE_BETA("beta must be positive ({0})"),
     NOT_POSITIVE_COLUMNDIMENSION("invalid column dimension: {0} (must be positive)"),
diff --git a/src/main/resources/META-INF/localization/LocalizedFormats_fr.properties b/src/main/resources/META-INF/localization/LocalizedFormats_fr.properties
index 14f0b3524..daac310f4 100644
--- a/src/main/resources/META-INF/localization/LocalizedFormats_fr.properties
+++ b/src/main/resources/META-INF/localization/LocalizedFormats_fr.properties
@@ -140,6 +140,7 @@ NOT_ENOUGH_POINTS_IN_SPLINE_PARTITION = une partiction spline n\u00e9cessite au
 NOT_INCREASING_NUMBER_OF_POINTS = les points {0} et {1} ne sont pas croissants ({2} > {3})
 NOT_INCREASING_SEQUENCE = les points {3} et {2} ne sont pas croissants ({1} > {0})
 NOT_MULTIPLICATION_COMPATIBLE_MATRICES = les dimensions {0}x{1} et {2}x{3} sont incompatibles pour la multiplication matricielle
+NOT_OVERRIDEN = m\u00e9thode n'est pas remplac\u00e9e
 NOT_POSITIVE_ALPHA = alpha doit \u00eatre positif ({0})
 NOT_POSITIVE_BETA = beta doit \u00eatre positif ({0})
 NOT_POSITIVE_COLUMNDIMENSION = nombre de colonnes invalide : {0} (doit \u00eatre positif)