diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 77f2d5a799..a1e2ed2f67 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -6057,6 +6057,7 @@ Protocol Buffer Text Format:
   - ".textproto"
   - ".pbt"
   - ".pbtxt"
+  - ".txtpb"
   tm_scope: source.textproto
   ace_mode: text
   language_id: 436568854
diff --git a/samples/Protocol Buffer Text Format/submission.txtpb b/samples/Protocol Buffer Text Format/submission.txtpb
new file mode 100644
index 0000000000..7cf74b3bfc
--- /dev/null
+++ b/samples/Protocol Buffer Text Format/submission.txtpb	
@@ -0,0 +1,33 @@
+# Modify this file to fill in your information and then
+# run create_submission to generate a submission file.
+
+task: DETECTION_3D
+account_name: "your_registered_email@gmail.com"
+# Change this to your unique method name. Max 25 chars.
+unique_method_name: "Your unique method name."
+
+authors: "Author1"
+authors: "Author2"
+
+affiliation: "Your affiliation."
+description: "A detailed description of your method."
+
+method_link: "A link to your method, e.g. paper, code etc."
+
+# This is optional. Set this to evaluate your model latency.
+docker_image_source: "Link to the latency submission Docker image stored in Google Storage bucket or pushed to Google Container/Artifact Registry. See submission.proto for details."
+
+# See submission.proto for allowed types.
+sensor_type: LIDAR_ALL
+
+number_past_frames_exclude_current: 0
+number_future_frames_exclude_current: 0
+
+object_types: TYPE_VEHICLE
+object_types: TYPE_PEDESTRIAN
+object_types: TYPE_CYCLIST
+
+# Self-reported latency in seconds. This is NOT shown on the leaderboard for
+# now. But it is still recommended to set this. That is needed to evaluate
+# your model latency on our server.
+latency_second: -1
\ No newline at end of file