diff --git a/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java b/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java
index 57cdde84e..e1ff0b8e2 100644
--- a/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java
+++ b/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java
@@ -95,7 +95,7 @@ public class FessLabels extends UserMessages {
     /** The key of the message: Port */
     public static final String LABELS_PORT = "{labels.port}";
 
-    /** The key of the message: Regexp. */
+    /** The key of the message: Regular Expression */
     public static final String LABELS_REGEX = "{labels.regex}";
 
     /** The key of the message: Regular Name */
diff --git a/src/main/resources/fess_label.properties b/src/main/resources/fess_label.properties
index 2a11e1b45..a15b43a6b 100644
--- a/src/main/resources/fess_label.properties
+++ b/src/main/resources/fess_label.properties
@@ -21,7 +21,7 @@ labels.pageNumber=Page Number
 labels.password=Password
 labels.paths=Paths
 labels.port=Port
-labels.regex=Regexp.
+labels.regex=Regular Expression
 labels.regularName=Regular Name
 labels.replacement=Replacement
 labels.sessionId=Session ID
@@ -1048,4 +1048,4 @@ labels.storage_button_download=Download
 labels.login.newpassword=Your password needs to be updated.
 labels.login.placeholder_new_password=New Password
 labels.login.placeholder_confirm_new_password=Confirm New Password
-labels.login.update=Update
\ No newline at end of file
+labels.login.update=Update
diff --git a/src/main/resources/fess_label_en.properties b/src/main/resources/fess_label_en.properties
index 2a11e1b45..a15b43a6b 100644
--- a/src/main/resources/fess_label_en.properties
+++ b/src/main/resources/fess_label_en.properties
@@ -21,7 +21,7 @@ labels.pageNumber=Page Number
 labels.password=Password
 labels.paths=Paths
 labels.port=Port
-labels.regex=Regexp.
+labels.regex=Regular Expression
 labels.regularName=Regular Name
 labels.replacement=Replacement
 labels.sessionId=Session ID
@@ -1048,4 +1048,4 @@ labels.storage_button_download=Download
 labels.login.newpassword=Your password needs to be updated.
 labels.login.placeholder_new_password=New Password
 labels.login.placeholder_confirm_new_password=Confirm New Password
-labels.login.update=Update
\ No newline at end of file
+labels.login.update=Update