CHANGELOG.md in google-cloud-translate-1.4.0 vs CHANGELOG.md in google-cloud-translate-2.0.0

@@ -1,6 +1,39 @@
 # Release History
 
+### 2.0.0 / 2019-10-28
+
+#### ⚠ BREAKING CHANGES
+
+* Add Translate V3 client
+  * Update google-cloud-translate to contain a generated v3 client
+    as well as the legacy hand-written v2 client.
+  * The following methods now return an instance of
+    Google::Cloud::Translate::V3::TranslationServiceClient:
+    * Google::Cloud#translate
+    * Google::Cloud.translate
+    * Google::Cloud::Translate.new
+  * To use the legacy v2 client specify the version when creating:
+    * v2_client = Google::Cloud::Translate.new version: :v2
+
+#### Features
+
+* Add Translate V3 client
+  * The v3 client includes several new features and updates:
+  * Glossaries - Create a custom dictionary to correctly and
+    consistently translate terms that are customer-specific.
+  * Batch requests - Make an asynchronous request to translate
+    large amounts of text.
+  * AutoML models - Cloud Translation adds support for translating
+    text with custom models that you create using AutoML Translation.
+  * Labels - The Cloud Translation API supports adding user-defined
+    labels (key-value pairs) to requests.
+* Now requires Ruby 2.4 or later.
+
+#### Documentation
+
+* Update the list of GCP environments for automatic authentication
+
 ### 1.4.0 / 2019-10-01
 
 #### Features
 
 * Support overriding of service endpoint