diff --git a/generated/google/apis/commentanalyzer_v1alpha1.rb b/generated/google/apis/commentanalyzer_v1alpha1.rb
index 856195dd7..700be1f45 100644
--- a/generated/google/apis/commentanalyzer_v1alpha1.rb
+++ b/generated/google/apis/commentanalyzer_v1alpha1.rb
@@ -30,7 +30,7 @@ module Google
     # @see https://github.com/conversationai/perspectiveapi/blob/master/README.md
     module CommentanalyzerV1alpha1
       VERSION = 'V1alpha1'
-      REVISION = '20190922'
+      REVISION = '20191124'
 
       # View your email address
       AUTH_USERINFO_EMAIL = 'https://www.googleapis.com/auth/userinfo.email'
diff --git a/generated/google/apis/commentanalyzer_v1alpha1/classes.rb b/generated/google/apis/commentanalyzer_v1alpha1/classes.rb
index 3c24b4c72..475d976d0 100644
--- a/generated/google/apis/commentanalyzer_v1alpha1/classes.rb
+++ b/generated/google/apis/commentanalyzer_v1alpha1/classes.rb
@@ -62,14 +62,14 @@ module Google
         attr_accessor :do_not_store
         alias_method :do_not_store?, :do_not_store
       
-        # The language(s) of the comment and context (if none are specified, the
-        # language is automatically detected). If multiple languages are specified,
-        # the text is checked in all of them that are supported. Both ISO and BCP-47
-        # language codes are accepted.
-        # Current Language Restrictions:
-        # * Only English text ("en") is supported.
-        # If none of the languages specified by the caller are supported, an
-        # `UNIMPLEMENTED` error is returned.
+        # The language(s) of the comment and context. If none are specified, we
+        # attempt to automatically detect the language. Specifying multiple languages
+        # means the text contains multiple lanugages. Both ISO and BCP-47 language
+        # codes are accepted.
+        # The server returns an error if no language was specified and language
+        # detection fails. The server also returns an error if the languages (either
+        # specified by the caller, or auto-detected) are not *all* supported by the
+        # service.
         # Corresponds to the JSON property `languages`
         # @return [Array<String>]
         attr_accessor :languages
@@ -146,10 +146,10 @@ module Google
         # The language(s) used by CommentAnalyzer service to choose which Model to
         # use when analyzing the comment. Might better be called
         # "effective_languages". The logic used to make the choice is as follows:
-        # if Request.languages.empty()
-        # effective_languages = detected_languages
-        # else
+        # if !Request.languages.empty()
         # effective_languages = Request.languages
+        # else
+        # effective_languages = detected_languages[0]
         # Corresponds to the JSON property `languages`
         # @return [Array<String>]
         attr_accessor :languages
@@ -389,14 +389,9 @@ module Google
         # @return [Google::Apis::CommentanalyzerV1alpha1::Context]
         attr_accessor :context
       
-        # The language(s) of the comment and context (if none are specified, the
-        # language is automatically detected). If multiple languages are specified,
-        # the text is checked in all of them that are supported. Both ISO and BCP-47
-        # language codes are accepted.
-        # Current Language Restrictions:
-        # * Only English text ("en") is supported.
-        # If none of the languages specified by the caller are supported, an
-        # `UNIMPLEMENTED` error is returned.
+        # The language(s) of the comment and context. If none are specified, we
+        # attempt to automatically detect the language. Both ISO and BCP-47 language
+        # codes are accepted.
         # Corresponds to the JSON property `languages`
         # @return [Array<String>]
         attr_accessor :languages