diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationError.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationError.java
index 74885fa0d..e844d684c 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationError.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationError.java
@@ -488,7 +488,7 @@ public com.google.protobuf.ByteString getEntriesBytes(int index) {
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
@@ -511,7 +511,7 @@ public java.lang.String getErrorMessage() {
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
@@ -1276,7 +1276,7 @@ public Builder addEntriesBytes(com.google.protobuf.ByteString value) {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1298,7 +1298,7 @@ public java.lang.String getErrorMessage() {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1320,7 +1320,7 @@ public com.google.protobuf.ByteString getErrorMessageBytes() {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1341,7 +1341,7 @@ public Builder setErrorMessage(java.lang.String value) {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1358,7 +1358,7 @@ public Builder clearErrorMessage() {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationErrorOrBuilder.java b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationErrorOrBuilder.java
index a8985f3aa..6578f23b9 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationErrorOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2/src/main/java/com/google/cloud/dialogflow/v2/ValidationErrorOrBuilder.java
@@ -151,7 +151,7 @@ public interface ValidationErrorOrBuilder
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
@@ -163,7 +163,7 @@ public interface ValidationErrorOrBuilder
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
diff --git a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/validation_result.proto b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/validation_result.proto
index e41cb9cde..5b8d27806 100644
--- a/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/validation_result.proto
+++ b/proto-google-cloud-dialogflow-v2/src/main/proto/google/cloud/dialogflow/v2/validation_result.proto
@@ -65,7 +65,7 @@ message ValidationError {
   // associated with certain entities.
   repeated string entries = 3;
 
-  // The detailed error messsage.
+  // The detailed error message.
   string error_message = 4;
 }
 
diff --git a/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationError.java b/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationError.java
index 213ea631b..231cd91ab 100644
--- a/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationError.java
+++ b/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationError.java
@@ -490,7 +490,7 @@ public com.google.protobuf.ByteString getEntriesBytes(int index) {
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
@@ -513,7 +513,7 @@ public java.lang.String getErrorMessage() {
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
@@ -1280,7 +1280,7 @@ public Builder addEntriesBytes(com.google.protobuf.ByteString value) {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1302,7 +1302,7 @@ public java.lang.String getErrorMessage() {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1324,7 +1324,7 @@ public com.google.protobuf.ByteString getErrorMessageBytes() {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1345,7 +1345,7 @@ public Builder setErrorMessage(java.lang.String value) {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
@@ -1362,7 +1362,7 @@ public Builder clearErrorMessage() {
      *
      *
      * <pre>
-     * The detailed error messsage.
+     * The detailed error message.
      * </pre>
      *
      * <code>string error_message = 4;</code>
diff --git a/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationErrorOrBuilder.java b/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationErrorOrBuilder.java
index 0f79febf3..5d74fc8e1 100644
--- a/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationErrorOrBuilder.java
+++ b/proto-google-cloud-dialogflow-v2beta1/src/main/java/com/google/cloud/dialogflow/v2beta1/ValidationErrorOrBuilder.java
@@ -151,7 +151,7 @@ public interface ValidationErrorOrBuilder
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
@@ -163,7 +163,7 @@ public interface ValidationErrorOrBuilder
    *
    *
    * <pre>
-   * The detailed error messsage.
+   * The detailed error message.
    * </pre>
    *
    * <code>string error_message = 4;</code>
diff --git a/proto-google-cloud-dialogflow-v2beta1/src/main/proto/google/cloud/dialogflow/v2beta1/validation_result.proto b/proto-google-cloud-dialogflow-v2beta1/src/main/proto/google/cloud/dialogflow/v2beta1/validation_result.proto
index 82352ad08..2daeaf329 100644
--- a/proto-google-cloud-dialogflow-v2beta1/src/main/proto/google/cloud/dialogflow/v2beta1/validation_result.proto
+++ b/proto-google-cloud-dialogflow-v2beta1/src/main/proto/google/cloud/dialogflow/v2beta1/validation_result.proto
@@ -65,7 +65,7 @@ message ValidationError {
   // associated with certain entities.
   repeated string entries = 3;
 
-  // The detailed error messsage.
+  // The detailed error message.
   string error_message = 4;
 }
 
diff --git a/synth.metadata b/synth.metadata
index 8796772ef..671ca2e27 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -11,16 +11,16 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "5fe3c6322046ed5cfc41e6c41c7ebac54db589dd",
-        "internalRef": "380595849"
+        "sha": "41521e288c8c2a4586dd46938bf574d0d36872e9",
+        "internalRef": "387960382"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "5fe3c6322046ed5cfc41e6c41c7ebac54db589dd",
-        "internalRef": "380595849"
+        "sha": "41521e288c8c2a4586dd46938bf574d0d36872e9",
+        "internalRef": "387960382"
       }
     },
     {