diff --git a/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/async_client.py b/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/async_client.py
index 8b8345c5b780..01b3f2e954f7 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/async_client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/async_client.py
@@ -132,7 +132,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/client.py b/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/client.py
index e4dc62b644a8..8ed61781bd79 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1/services/adaptation/client.py
@@ -312,7 +312,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/async_client.py b/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/async_client.py
index 1594b3b07ed2..ba3abcdcab8a 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/async_client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/async_client.py
@@ -132,7 +132,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/client.py b/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/client.py
index d630bd9c79dd..0d4610d248b8 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1/services/speech/client.py
@@ -315,7 +315,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/async_client.py b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/async_client.py
index 1fdf0ae5b691..ae9ba0a16381 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/async_client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/async_client.py
@@ -131,7 +131,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/client.py b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/client.py
index cac351e3f6fc..e518799374d0 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/adaptation/client.py
@@ -311,7 +311,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/async_client.py b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/async_client.py
index 7d0bca58e2e2..685784768c73 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/async_client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/async_client.py
@@ -131,7 +131,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/client.py b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/client.py
index 0d853e601436..e3bd8bf607f3 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v1p1beta1/services/speech/client.py
@@ -314,7 +314,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/async_client.py b/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/async_client.py
index 63a4cff68143..e9cea7131c7f 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/async_client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/async_client.py
@@ -144,7 +144,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/client.py b/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/client.py
index f37e4c14c3b4..23efdd9dcac1 100644
--- a/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/client.py
+++ b/packages/google-cloud-speech/google/cloud/speech_v2/services/speech/client.py
@@ -410,7 +410,7 @@ def get_mtls_endpoint_and_cert_source(
         The API endpoint is determined in the following order:
         (1) if `client_options.api_endpoint` if provided, use the provided one.
         (2) if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is "always", use the
-        default mTLS endpoint; if the environment variabel is "never", use the default API
+        default mTLS endpoint; if the environment variable is "never", use the default API
         endpoint; otherwise if client cert source exists, use the default mTLS endpoint, otherwise
         use the default API endpoint.
 
diff --git a/packages/google-cloud-speech/setup.py b/packages/google-cloud-speech/setup.py
index e110ab2b50a4..4fdce7e2544e 100644
--- a/packages/google-cloud-speech/setup.py
+++ b/packages/google-cloud-speech/setup.py
@@ -38,6 +38,7 @@
 dependencies = [
     "google-api-core[grpc] >= 1.34.0, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*,!=2.8.*,!=2.9.*,!=2.10.*",
     "proto-plus >= 1.22.0, <2.0.0dev",
+    "proto-plus >= 1.22.2, <2.0.0dev; python_version>='3.11'",
     "protobuf>=3.19.5,<5.0.0dev,!=3.20.0,!=3.20.1,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
 ]
 url = "https://github.com/googleapis/python-speech"
@@ -77,6 +78,7 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Operating System :: OS Independent",
         "Topic :: Internet",
     ],
diff --git a/packages/google-cloud-speech/testing/constraints-3.12.txt b/packages/google-cloud-speech/testing/constraints-3.12.txt
new file mode 100644
index 000000000000..ed7f9aed2559
--- /dev/null
+++ b/packages/google-cloud-speech/testing/constraints-3.12.txt
@@ -0,0 +1,6 @@
+# -*- coding: utf-8 -*-
+# This constraints file is required for unit tests.
+# List all library dependencies and extras in this file.
+google-api-core
+proto-plus
+protobuf