diff --git a/translate/google/cloud/translate_v2/_http.py b/translate/google/cloud/translate_v2/_http.py
index a89ea0114a3f..b73f5f595450 100644
--- a/translate/google/cloud/translate_v2/_http.py
+++ b/translate/google/cloud/translate_v2/_http.py
@@ -19,16 +19,22 @@
 from google.cloud.translate_v2 import __version__
 
 
-_CLIENT_INFO = _http.CLIENT_INFO_TEMPLATE.format(__version__)
-
-
 class Connection(_http.JSONConnection):
     """A connection to Google Cloud Translation API via the JSON REST API.
 
     :type client: :class:`~google.cloud.translate.client.Client`
     :param client: The client that owns the current connection.
+
+    :type client_info: :class:`~google.api_core.client_info.ClientInfo`
+    :param client_info: (Optional) instance used to generate user agent.
     """
 
+    def __init__(self, client, client_info=None):
+        super(Connection, self).__init__(client, client_info)
+
+        self._client_info.gapic_version = __version__
+        self._client_info.client_library_version = __version__
+
     API_BASE_URL = "https://translation.googleapis.com"
     """The base of the API call URL."""
 
@@ -37,5 +43,3 @@ class Connection(_http.JSONConnection):
 
     API_URL_TEMPLATE = "{api_base_url}/language/translate/{api_version}{path}"
     """A template for the URL of a particular API call."""
-
-    _EXTRA_HEADERS = {_http.CLIENT_INFO_HEADER: _CLIENT_INFO}
diff --git a/translate/google/cloud/translate_v2/client.py b/translate/google/cloud/translate_v2/client.py
index f5945f793cd0..9e7e4d351478 100644
--- a/translate/google/cloud/translate_v2/client.py
+++ b/translate/google/cloud/translate_v2/client.py
@@ -54,15 +54,28 @@ class Client(BaseClient):
                   ``credentials`` for the current object.
                   This parameter should be considered private, and could
                   change in the future.
+
+    :type client_info: :class:`~google.api_core.client_info.ClientInfo`
+    :param client_info:
+        The client info used to send a user-agent string along with API
+        requests. If ``None``, then default info will be used. Generally,
+        you only need to set this if you're developing your own library
+        or partner tool.
     """
 
     SCOPE = ("https://www.googleapis.com/auth/cloud-platform",)
     """The scopes required for authenticating."""
 
-    def __init__(self, target_language=ENGLISH_ISO_639, credentials=None, _http=None):
+    def __init__(
+        self,
+        target_language=ENGLISH_ISO_639,
+        credentials=None,
+        _http=None,
+        client_info=None,
+    ):
         self.target_language = target_language
         super(Client, self).__init__(credentials=credentials, _http=_http)
-        self._connection = Connection(self)
+        self._connection = Connection(self, client_info=client_info)
 
     def get_languages(self, target_language=None):
         """Get list of supported languages for translation.
diff --git a/translate/tests/unit/test__http.py b/translate/tests/unit/test__http.py
index 714ace292c0b..d179ce330653 100644
--- a/translate/tests/unit/test__http.py
+++ b/translate/tests/unit/test__http.py
@@ -50,9 +50,7 @@ def test_build_api_url_w_extra_query_params(self):
 
     def test_extra_headers(self):
         import requests
-
         from google.cloud import _http as base_http
-        from google.cloud.translate_v2 import _http as MUT
 
         http = mock.create_autospec(requests.Session, instance=True)
         response = requests.Response()
@@ -69,8 +67,8 @@ def test_extra_headers(self):
 
         expected_headers = {
             "Accept-Encoding": "gzip",
-            base_http.CLIENT_INFO_HEADER: MUT._CLIENT_INFO,
-            "User-Agent": conn.USER_AGENT,
+            base_http.CLIENT_INFO_HEADER: conn.user_agent,
+            "User-Agent": conn.user_agent,
         }
         expected_uri = conn.build_api_url("/rainbow")
         http.request.assert_called_once_with(
diff --git a/translate/tests/unit/test_client.py b/translate/tests/unit/test_client.py
index 1fe19451e39e..e014657bc882 100644
--- a/translate/tests/unit/test_client.py
+++ b/translate/tests/unit/test_client.py
@@ -25,7 +25,8 @@ def _get_target_class():
     def _make_one(self, *args, **kw):
         return self._get_target_class()(*args, **kw)
 
-    def test_constructor(self):
+    def test_constructor_defaults(self):
+        from google.cloud._http import ClientInfo
         from google.cloud.translate_v2._http import Connection
         from google.cloud.translate_v2.client import ENGLISH_ISO_639
 
@@ -35,17 +36,23 @@ def test_constructor(self):
         self.assertIsNone(client._connection.credentials)
         self.assertIs(client._connection.http, http)
         self.assertEqual(client.target_language, ENGLISH_ISO_639)
+        self.assertIsInstance(client._connection._client_info, ClientInfo)
 
-    def test_constructor_non_default(self):
+    def test_constructor_explicit(self):
+        from google.cloud._http import ClientInfo
         from google.cloud.translate_v2._http import Connection
 
         http = object()
         target = "es"
-        client = self._make_one(target_language=target, _http=http)
+        client_info = ClientInfo()
+        client = self._make_one(
+            target_language=target, _http=http, client_info=client_info
+        )
         self.assertIsInstance(client._connection, Connection)
         self.assertIsNone(client._connection.credentials)
         self.assertIs(client._connection.http, http)
         self.assertEqual(client.target_language, target)
+        self.assertIs(client._connection._client_info, client_info)
 
     def test_get_languages(self):
         from google.cloud.translate_v2.client import ENGLISH_ISO_639