diff --git a/tools/internal_ci/linux/grpc_e2e_performance_gke.sh b/tools/internal_ci/linux/grpc_e2e_performance_gke.sh
index a8da8a9fae6..6525bd5e54a 100755
--- a/tools/internal_ci/linux/grpc_e2e_performance_gke.sh
+++ b/tools/internal_ci/linux/grpc_e2e_performance_gke.sh
@@ -19,7 +19,6 @@ cd "$(dirname "$0")/../../.."
 
 source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
-
 # Environment variables to select repos and branches for various repos.
 # You can edit these lines if you want to run from a fork.
 GRPC_CORE_REPO=grpc/grpc
@@ -43,20 +42,20 @@ gcloud auth configure-docker
 # Connect to benchmarks-prod2 cluster.
 gcloud config set project grpc-testing
 gcloud container clusters get-credentials benchmarks-prod2 \
-    --zone us-central1-b --project grpc-testing
+  --zone us-central1-b --project grpc-testing
 
 # Set up environment variables.
 LOAD_TEST_PREFIX="${KOKORO_BUILD_INITIATOR}"
 # BEGIN differentiate experimental configuration from master configuration.
 if [[ "${KOKORO_BUILD_INITIATOR%%-*}" == kokoro && "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
-    # Use "official" BQ tables only for builds initiated by Kokoro and running
-    # from grpc/grpc. These results show up in the "official" public dashboard.
-    BIGQUERY_TABLE_8CORE=e2e_benchmarks.ci_master_results_8core
-    BIGQUERY_TABLE_32CORE=e2e_benchmarks.ci_master_results_32core
+  # Use "official" BQ tables only for builds initiated by Kokoro and running
+  # from grpc/grpc. These results show up in the "official" public dashboard.
+  BIGQUERY_TABLE_8CORE=e2e_benchmarks.ci_master_results_8core
+  BIGQUERY_TABLE_32CORE=e2e_benchmarks.ci_master_results_32core
 else
-    # Use experimental BQ tables otherwise.
-    BIGQUERY_TABLE_8CORE=e2e_benchmarks.experimental_results
-    BIGQUERY_TABLE_32CORE=e2e_benchmarks.experimental_results_32core
+  # Use experimental BQ tables otherwise.
+  BIGQUERY_TABLE_8CORE=e2e_benchmarks.experimental_results
+  BIGQUERY_TABLE_32CORE=e2e_benchmarks.experimental_results_32core
 fi
 # END differentiate experimental configuration from master configuration.
 CLOUD_LOGGING_URL="https://source.cloud.google.com/results/invocations/${KOKORO_BUILD_ID}"
@@ -67,9 +66,9 @@ ROOT_DIRECTORY_OF_DOCKERFILES="../test-infra/containers/pre_built_workers/"
 GRPC_COMMIT="$(git show --format="%H" --no-patch)"
 # Prebuilt workers for core languages are always built from grpc/grpc.
 if [[ "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
-    GRPC_CORE_COMMIT="${KOKORO_GIT_COMMIT}"
+  GRPC_CORE_COMMIT="${KOKORO_GIT_COMMIT}"
 else
-    GRPC_CORE_COMMIT="$(git ls-remote -h "https://github.com/${GRPC_CORE_REPO}.git" "${GRPC_CORE_GITREF}" | cut -f1)"
+  GRPC_CORE_COMMIT="$(git ls-remote -h "https://github.com/${GRPC_CORE_REPO}.git" "${GRPC_CORE_GITREF}" | cut -f1)"
 fi
 
 GRPC_DOTNET_COMMIT="$(git ls-remote "https://github.com/${GRPC_DOTNET_REPO}.git" "${GRPC_DOTNET_GITREF}" | cut -f1)"
@@ -94,76 +93,109 @@ popd
 
 # Build test configurations.
 buildConfigs() {
-    local -r pool="$1"
-    local -r table="$2"
-    shift 2
-    tools/run_tests/performance/loadtest_config.py "$@" \
-        -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_all_languages.yaml \
-        -s driver_pool="${DRIVER_POOL}" -s driver_image= \
-        -s client_pool="${pool}" -s server_pool="${pool}" \
-        -s big_query_table="${table}" -s timeout_seconds=900 \
-        -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
-        -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
-        -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
-        -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
-        -a ci_jobName="${KOKORO_JOB_NAME}" \
-        -a ci_gitCommit="${GRPC_COMMIT}" \
-        -a ci_gitCommit_core="${GRPC_CORE_COMMIT}" \
-        -a ci_gitCommit_dotnet="${GRPC_DOTNET_COMMIT}" \
-        -a ci_gitCommit_go="${GRPC_GO_COMMIT}" \
-        -a ci_gitCommit_java="${GRPC_JAVA_COMMIT}" \
-        -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
-        --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
-        -a pool="${pool}" --category=scalable \
-        --allow_client_language=c++ --allow_server_language=c++ \
-        --allow_server_language=node \
-        -o "loadtest_with_prebuilt_workers_${pool}.yaml"
+  local -r pool="$1"
+  local -r table="$2"
+  shift 2
+  tools/run_tests/performance/loadtest_config.py "$@" \
+    -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_all_languages.yaml \
+    -s driver_pool="${DRIVER_POOL}" -s driver_image= \
+    -s client_pool="${pool}" -s server_pool="${pool}" \
+    -s big_query_table="${table}" -s timeout_seconds=900 \
+    -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
+    -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
+    -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
+    -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
+    -a ci_jobName="${KOKORO_JOB_NAME}" \
+    -a ci_gitCommit="${GRPC_COMMIT}" \
+    -a ci_gitCommit_core="${GRPC_CORE_COMMIT}" \
+    -a ci_gitCommit_dotnet="${GRPC_DOTNET_COMMIT}" \
+    -a ci_gitCommit_go="${GRPC_GO_COMMIT}" \
+    -a ci_gitCommit_java="${GRPC_JAVA_COMMIT}" \
+    -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
+    --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
+    -a pool="${pool}" --category=scalable \
+    --allow_client_language=c++ --allow_server_language=c++ \
+    --allow_server_language=node \
+    -o "loadtest_with_prebuilt_workers_${pool}.yaml"
 }
 
-# Add languages
+# List all languages.
+declare -A useLanguage=(
+  [c++]=1
+  [dotnet]=1
+  [go]=1
+  [java]=1
+  [node]=1
+  [ruby]=1
+)
+
+# Disable specific languages.
+declare -a disabledLanguages=(
+  # Add a language here to disable it.
+  dotnet
+)
+for language in "${disabledLanguages[@]}"; do
+  unset "useLanguage[${language}]"
+done
+
+# Add arguments for languages.
 declare -a configLangArgs8core=()
 declare -a configLangArgs32core=()
 declare -a runnerLangArgs=()
 
 # c++
-configLangArgs8core+=( -l c++ )
-configLangArgs32core+=( -l c++ )
-runnerLangArgs+=( -l "cxx:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" )
+if [[ -v "useLanguage[c++]" ]]; then
+  configLangArgs8core+=(-l c++)
+  configLangArgs32core+=(-l c++)
+  runnerLangArgs+=(-l "cxx:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}")
+fi
 
 # dotnet
-# configLangArgs8core+=( -l dotnet )
-# configLangArgs32core+=( -l dotnet )
-# runnerLangArgs+=( -l "dotnet:${GRPC_DOTNET_REPO}:${GRPC_DOTNET_COMMIT}" )
+if [[ -v "useLanguage[dotnet]" ]]; then
+  configLangArgs8core+=(-l dotnet)
+  configLangArgs32core+=(-l dotnet)
+  runnerLangArgs+=(-l "dotnet:${GRPC_DOTNET_REPO}:${GRPC_DOTNET_COMMIT}")
+fi
 
-# # go
-configLangArgs8core+=( -l go )
-configLangArgs32core+=( -l go )
-runnerLangArgs+=( -l "go:${GRPC_GO_REPO}:${GRPC_GO_COMMIT}" )
+# go
+if [[ -v "useLanguage[go]" ]]; then
+  configLangArgs8core+=(-l go)
+  configLangArgs32core+=(-l go)
+  runnerLangArgs+=(-l "go:${GRPC_GO_REPO}:${GRPC_GO_COMMIT}")
+fi
 
 # java
-configLangArgs8core+=( -l java )
-configLangArgs32core+=( -l java )
-runnerLangArgs+=( -l "java:${GRPC_JAVA_REPO}:${GRPC_JAVA_COMMIT}" )
+if [[ -v "useLanguage[java]" ]]; then
+  configLangArgs8core+=(-l java)
+  configLangArgs32core+=(-l java)
+  runnerLangArgs+=(-l "java:${GRPC_JAVA_REPO}:${GRPC_JAVA_COMMIT}")
+fi
 
 # node
-configLangArgs8core+=( -l node )  # 8-core only.
-runnerLangArgs+=( -l "node:${GRPC_NODE_REPO}:${GRPC_NODE_COMMIT}" )
+if [[ -v "useLanguage[node]" ]]; then
+  configLangArgs8core+=(-l node) # 8-core only.
+  runnerLangArgs+=(-l "node:${GRPC_NODE_REPO}:${GRPC_NODE_COMMIT}")
+fi
 
 # python
-configLangArgs8core+=( -l python )  # 8-core only.
-runnerLangArgs+=( -l "python:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" )
+if [[ -v "useLanguage[python]" ]]; then
+  configLangArgs8core+=(-l python) # 8-core only.
+  runnerLangArgs+=(-l "python:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}")
+fi
 
 # ruby
-configLangArgs8core+=( -l ruby )  # 8-core only.
-runnerLangArgs+=( -l "ruby:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" )
+if [[ -v "useLanguage[ruby]" ]]; then
+  configLangArgs8core+=(-l ruby) # 8-core only.
+  runnerLangArgs+=(-l "ruby:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}")
+fi
 
 buildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" "${configLangArgs8core[@]}"
 buildConfigs "${WORKER_POOL_32CORE}" "${BIGQUERY_TABLE_32CORE}" "${configLangArgs32core[@]}"
 
 # Delete prebuilt images on exit.
 deleteImages() {
-    echo "deleting images on exit"
-    ../test-infra/bin/delete_prebuilt_workers \
+  echo "deleting images on exit"
+  ../test-infra/bin/delete_prebuilt_workers \
     -p "${PREBUILT_IMAGE_PREFIX}" \
     -t "${UNIQUE_IDENTIFIER}"
 }
@@ -171,16 +203,16 @@ trap deleteImages EXIT
 
 # Build and push prebuilt images for running tests.
 time ../test-infra/bin/prepare_prebuilt_workers "${runnerLangArgs[@]}" \
-    -p "${PREBUILT_IMAGE_PREFIX}" \
-    -t "${UNIQUE_IDENTIFIER}" \
-    -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
+  -p "${PREBUILT_IMAGE_PREFIX}" \
+  -t "${UNIQUE_IDENTIFIER}" \
+  -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
 
 # Run tests.
 time ../test-infra/bin/runner \
-    -i "loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
-    -i "loadtest_with_prebuilt_workers_${WORKER_POOL_32CORE}.yaml" \
-    -log-url-prefix "${LOG_URL_PREFIX}" \
-    -polling-interval 5s \
-    -delete-successful-tests \
-    -c "${WORKER_POOL_8CORE}:2" -c "${WORKER_POOL_32CORE}:2" \
-    -o "runner/sponge_log.xml"
+  -i "loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
+  -i "loadtest_with_prebuilt_workers_${WORKER_POOL_32CORE}.yaml" \
+  -log-url-prefix "${LOG_URL_PREFIX}" \
+  -polling-interval 5s \
+  -delete-successful-tests \
+  -c "${WORKER_POOL_8CORE}:2" -c "${WORKER_POOL_32CORE}:2" \
+  -o "runner/sponge_log.xml"
diff --git a/tools/internal_ci/linux/grpc_e2e_performance_gke_cxx_experiments_framework.sh b/tools/internal_ci/linux/grpc_e2e_performance_gke_cxx_experiments_framework.sh
index dfad208da8c..723369b2580 100755
--- a/tools/internal_ci/linux/grpc_e2e_performance_gke_cxx_experiments_framework.sh
+++ b/tools/internal_ci/linux/grpc_e2e_performance_gke_cxx_experiments_framework.sh
@@ -18,9 +18,9 @@ set -ex
 #
 # To run the benchmarks, add your experiment to the set below.
 declare -a GRPC_EXPERIMENTS=(
-    "event_engine_listener"
-    "event_engine_client"
-    "event_engine_client,event_engine_listener"
+  "event_engine_listener"
+  "event_engine_client"
+  "event_engine_client,event_engine_listener"
 )
 
 # Enter the gRPC repo root.
@@ -43,13 +43,13 @@ gcloud auth configure-docker
 # Connect to benchmarks-prod2 cluster.
 gcloud config set project grpc-testing
 gcloud container clusters get-credentials benchmarks-prod2 \
-    --zone us-central1-b --project grpc-testing
+  --zone us-central1-b --project grpc-testing
 
 # Set up environment variables.
 LOAD_TEST_PREFIX="${KOKORO_BUILD_INITIATOR}"
 # BEGIN differentiate experimental configuration from master configuration.
 if [[ "${KOKORO_BUILD_INITIATOR%%-*}" == kokoro ]]; then
-    LOAD_TEST_PREFIX=kokoro
+  LOAD_TEST_PREFIX=kokoro
 fi
 # Use the "official" BQ tables so that the measurements will show up in the
 # "official" public dashboard.
@@ -64,9 +64,9 @@ ROOT_DIRECTORY_OF_DOCKERFILES="../test-infra/containers/pre_built_workers/"
 GRPC_COMMIT="$(git show --format="%H" --no-patch)"
 # Prebuilt workers for core languages are always built from grpc/grpc.
 if [[ "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
-    GRPC_CORE_COMMIT="${KOKORO_GIT_COMMIT}"
+  GRPC_CORE_COMMIT="${KOKORO_GIT_COMMIT}"
 else
-    GRPC_CORE_COMMIT="$(git ls-remote -h "https://github.com/${GRPC_CORE_REPO}.git" "${GRPC_CORE_GITREF}" | cut -f1)"
+  GRPC_CORE_COMMIT="$(git ls-remote -h "https://github.com/${GRPC_CORE_REPO}.git" "${GRPC_CORE_GITREF}" | cut -f1)"
 fi
 
 # Kokoro jobs run on dedicated pools.
@@ -89,62 +89,62 @@ declare -a loadtest_files=()
 
 # Build test configurations.
 buildConfigs() {
-    local -r pool="$1"
-    local -r base_table="$2"
-    local -r experiment="$3"
-    shift 3
-    # Multiple experiments are delimited by `__` (two underscores) in BigQuery.
-    SANITIZED_EXPERIMENT="${experiment//,/__}"
-    OUTFILE="loadtest_with_prebuilt_workers_${pool}_${SANITIZED_EXPERIMENT}.yaml"
-    tools/run_tests/performance/loadtest_config.py "$@" \
-        -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_cxx_experiments.yaml \
-        -s driver_pool="${DRIVER_POOL}" -s driver_image= \
-        -s client_pool="${pool}" -s server_pool="${pool}" \
-        -s big_query_table="${base_table}_${SANITIZED_EXPERIMENT}" -s timeout_seconds=900 \
-        -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
-        -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
-        -s grpc_experiment="${experiment}" \
-        -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
-        -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
-        -a ci_jobName="${KOKORO_JOB_NAME}" \
-        -a ci_gitCommit="${GRPC_COMMIT}" \
-        -a ci_gitCommit_core="${GRPC_CORE_COMMIT}" \
-        -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
-        --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
-        -a pool="${pool}" --category=dashboard \
-        --allow_client_language=c++ --allow_server_language=c++ \
-        --allow_server_language=node \
-        -o "${OUTFILE}"
-
-    loadtest_files+=(-i "${OUTFILE}")
+  local -r pool="$1"
+  local -r base_table="$2"
+  local -r experiment="$3"
+  shift 3
+  # Multiple experiments are delimited by `__` (two underscores) in BigQuery.
+  SANITIZED_EXPERIMENT="${experiment//,/__}"
+  OUTFILE="loadtest_with_prebuilt_workers_${pool}_${SANITIZED_EXPERIMENT}.yaml"
+  tools/run_tests/performance/loadtest_config.py "$@" \
+    -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_cxx_experiments.yaml \
+    -s driver_pool="${DRIVER_POOL}" -s driver_image= \
+    -s client_pool="${pool}" -s server_pool="${pool}" \
+    -s big_query_table="${base_table}_${SANITIZED_EXPERIMENT}" -s timeout_seconds=900 \
+    -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
+    -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
+    -s grpc_experiment="${experiment}" \
+    -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
+    -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
+    -a ci_jobName="${KOKORO_JOB_NAME}" \
+    -a ci_gitCommit="${GRPC_COMMIT}" \
+    -a ci_gitCommit_core="${GRPC_CORE_COMMIT}" \
+    -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
+    --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
+    -a pool="${pool}" --category=dashboard \
+    --allow_client_language=c++ --allow_server_language=c++ \
+    --allow_server_language=node \
+    -o "${OUTFILE}"
+
+  loadtest_files+=(-i "${OUTFILE}")
 }
 
 for experiment in "${GRPC_EXPERIMENTS[@]}"; do
-    buildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" "${experiment}" -l c++
-    buildConfigs "${WORKER_POOL_32CORE}" "${BIGQUERY_TABLE_32CORE}" "${experiment}" -l c++
+  buildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" "${experiment}" -l c++
+  buildConfigs "${WORKER_POOL_32CORE}" "${BIGQUERY_TABLE_32CORE}" "${experiment}" -l c++
 done
 
 # Delete prebuilt images on exit.
 deleteImages() {
-    echo "deleting images on exit"
-    ../test-infra/bin/delete_prebuilt_workers \
-        -p "${PREBUILT_IMAGE_PREFIX}" \
-        -t "${UNIQUE_IDENTIFIER}"
+  echo "deleting images on exit"
+  ../test-infra/bin/delete_prebuilt_workers \
+    -p "${PREBUILT_IMAGE_PREFIX}" \
+    -t "${UNIQUE_IDENTIFIER}"
 }
 trap deleteImages EXIT
 
 # Build and push prebuilt images for running tests.
 time ../test-infra/bin/prepare_prebuilt_workers \
-    -l "cxx:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" \
-    -p "${PREBUILT_IMAGE_PREFIX}" \
-    -t "${UNIQUE_IDENTIFIER}" \
-    -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
+  -l "cxx:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" \
+  -p "${PREBUILT_IMAGE_PREFIX}" \
+  -t "${UNIQUE_IDENTIFIER}" \
+  -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
 
 # Run tests.
 ../test-infra/bin/runner \
-    ${loadtest_files[@]} \
-    -log-url-prefix "${LOG_URL_PREFIX}" \
-    -polling-interval 5s \
-    -delete-successful-tests \
-    -c "${WORKER_POOL_8CORE}:2" -c "${WORKER_POOL_32CORE}:2" \
-    -o "runner/sponge_log.xml"
+  "${loadtest_files[@]}" \
+  -log-url-prefix "${LOG_URL_PREFIX}" \
+  -polling-interval 5s \
+  -delete-successful-tests \
+  -c "${WORKER_POOL_8CORE}:2" -c "${WORKER_POOL_32CORE}:2" \
+  -o "runner/sponge_log.xml"
diff --git a/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh b/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh
index c3b99af80eb..f15a716028a 100755
--- a/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh
+++ b/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh
@@ -19,7 +19,6 @@ cd "$(dirname "$0")/../../.."
 
 source tools/internal_ci/helper_scripts/prepare_build_linux_rc
 
-
 # Environment variables to select repos and branches for various repos.
 # You can edit these lines if you want to run from a fork.
 GRPC_CORE_REPO=grpc/grpc
@@ -43,13 +42,13 @@ gcloud auth configure-docker
 # Connect to benchmarks-prod2 cluster.
 gcloud config set project grpc-testing
 gcloud container clusters get-credentials benchmarks-prod2 \
-    --zone us-central1-b --project grpc-testing
+  --zone us-central1-b --project grpc-testing
 
 # Set up environment variables.
 LOAD_TEST_PREFIX="${KOKORO_BUILD_INITIATOR}"
 # BEGIN differentiate experimental configuration from master configuration.
 if [[ "${KOKORO_BUILD_INITIATOR%%-*}" == kokoro ]]; then
-    LOAD_TEST_PREFIX=kokoro-test
+  LOAD_TEST_PREFIX=kokoro-test
 fi
 BIGQUERY_TABLE_8CORE=e2e_benchmarks.experimental_results
 BIGQUERY_TABLE_32CORE=e2e_benchmarks.experimental_results_32core
@@ -62,9 +61,9 @@ ROOT_DIRECTORY_OF_DOCKERFILES="../test-infra/containers/pre_built_workers/"
 GRPC_COMMIT="$(git show --format="%H" --no-patch)"
 # Prebuilt workers for core languages are always built from grpc/grpc.
 if [[ "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
-    GRPC_CORE_COMMIT="${KOKORO_GIT_COMMIT}"
+  GRPC_CORE_COMMIT="${KOKORO_GIT_COMMIT}"
 else
-    GRPC_CORE_COMMIT="$(git ls-remote -h "https://github.com/${GRPC_CORE_REPO}.git" "${GRPC_CORE_GITREF}" | cut -f1)"
+  GRPC_CORE_COMMIT="$(git ls-remote -h "https://github.com/${GRPC_CORE_REPO}.git" "${GRPC_CORE_GITREF}" | cut -f1)"
 fi
 
 GRPC_DOTNET_COMMIT="$(git ls-remote "https://github.com/${GRPC_DOTNET_REPO}.git" "${GRPC_DOTNET_GITREF}" | cut -f1)"
@@ -89,75 +88,109 @@ popd
 
 # Build test configurations.
 buildConfigs() {
-    local -r pool="$1"
-    local -r table="$2"
-    shift 2
-    tools/run_tests/performance/loadtest_config.py "$@" \
-        -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_all_languages.yaml \
-        -s driver_pool="${DRIVER_POOL}" -s driver_image= \
-        -s client_pool="${pool}" -s server_pool="${pool}" \
-        -s big_query_table="${table}" -s timeout_seconds=900 \
-        -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
-        -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
-        -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
-        -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
-        -a ci_jobName="${KOKORO_JOB_NAME}" \
-        -a ci_gitCommit="${GRPC_COMMIT}" \
-        -a ci_gitCommit_core="${GRPC_CORE_COMMIT}" \
-        -a ci_gitCommit_dotnet="${GRPC_DOTNET_COMMIT}" \
-        -a ci_gitCommit_go="${GRPC_GO_COMMIT}" \
-        -a ci_gitCommit_java="${GRPC_JAVA_COMMIT}" \
-        -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
-        --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
-        -a pool="${pool}" --category=scalable \
-        --allow_client_language=c++ --allow_server_language=c++ \
-        -o "loadtest_with_prebuilt_workers_${pool}.yaml"
+  local -r pool="$1"
+  local -r table="$2"
+  shift 2
+  tools/run_tests/performance/loadtest_config.py "$@" \
+    -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_all_languages.yaml \
+    -s driver_pool="${DRIVER_POOL}" -s driver_image= \
+    -s client_pool="${pool}" -s server_pool="${pool}" \
+    -s big_query_table="${table}" -s timeout_seconds=900 \
+    -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
+    -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
+    -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
+    -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
+    -a ci_jobName="${KOKORO_JOB_NAME}" \
+    -a ci_gitCommit="${GRPC_COMMIT}" \
+    -a ci_gitCommit_core="${GRPC_CORE_COMMIT}" \
+    -a ci_gitCommit_dotnet="${GRPC_DOTNET_COMMIT}" \
+    -a ci_gitCommit_go="${GRPC_GO_COMMIT}" \
+    -a ci_gitCommit_java="${GRPC_JAVA_COMMIT}" \
+    -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
+    --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
+    -a pool="${pool}" --category=scalable \
+    --allow_client_language=c++ --allow_server_language=c++ \
+    --allow_server_language=node \
+    -o "loadtest_with_prebuilt_workers_${pool}.yaml"
 }
 
-# Add languages
+# List all languages.
+declare -A useLanguage=(
+  [c++]=1
+  [dotnet]=1
+  [go]=1
+  [java]=1
+  [node]=1
+  [ruby]=1
+)
+
+# Disable specific languages.
+declare -a disabledLanguages=(
+  # Add a language here to disable it.
+  dotnet
+)
+for language in "${disabledLanguages[@]}"; do
+  unset "useLanguage[${language}]"
+done
+
+# Add arguments for languages.
 declare -a configLangArgs8core=()
 declare -a configLangArgs32core=()
 declare -a runnerLangArgs=()
 
 # c++
-configLangArgs8core+=( -l c++ )
-configLangArgs32core+=( -l c++ )
-runnerLangArgs+=( -l "cxx:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" )
+if [[ -v "useLanguage[c++]" ]]; then
+  configLangArgs8core+=(-l c++)
+  configLangArgs32core+=(-l c++)
+  runnerLangArgs+=(-l "cxx:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}")
+fi
 
 # dotnet
-# configLangArgs8core+=( -l dotnet )
-# configLangArgs32core+=( -l dotnet )
-# runnerLangArgs+=( -l "dotnet:${GRPC_DOTNET_REPO}:${GRPC_DOTNET_COMMIT}" )
+if [[ -v "useLanguage[dotnet]" ]]; then
+  configLangArgs8core+=(-l dotnet)
+  configLangArgs32core+=(-l dotnet)
+  runnerLangArgs+=(-l "dotnet:${GRPC_DOTNET_REPO}:${GRPC_DOTNET_COMMIT}")
+fi
 
-# # go
-configLangArgs8core+=( -l go )
-configLangArgs32core+=( -l go )
-runnerLangArgs+=( -l "go:${GRPC_GO_REPO}:${GRPC_GO_COMMIT}" )
+# go
+if [[ -v "useLanguage[go]" ]]; then
+  configLangArgs8core+=(-l go)
+  configLangArgs32core+=(-l go)
+  runnerLangArgs+=(-l "go:${GRPC_GO_REPO}:${GRPC_GO_COMMIT}")
+fi
 
 # java
-configLangArgs8core+=( -l java )
-configLangArgs32core+=( -l java )
-runnerLangArgs+=( -l "java:${GRPC_JAVA_REPO}:${GRPC_JAVA_COMMIT}" )
+if [[ -v "useLanguage[java]" ]]; then
+  configLangArgs8core+=(-l java)
+  configLangArgs32core+=(-l java)
+  runnerLangArgs+=(-l "java:${GRPC_JAVA_REPO}:${GRPC_JAVA_COMMIT}")
+fi
 
 # node
-configLangArgs8core+=( -l node )  # 8-core only.
-runnerLangArgs+=( -l "node:${GRPC_NODE_REPO}:${GRPC_NODE_COMMIT}" )
+if [[ -v "useLanguage[node]" ]]; then
+  configLangArgs8core+=(-l node) # 8-core only.
+  runnerLangArgs+=(-l "node:${GRPC_NODE_REPO}:${GRPC_NODE_COMMIT}")
+fi
 
 # python
-configLangArgs8core+=( -l python )  # 8-core only.
-runnerLangArgs+=( -l "python:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" )
+if [[ -v "useLanguage[python]" ]]; then
+  configLangArgs8core+=(-l python) # 8-core only.
+  runnerLangArgs+=(-l "python:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}")
+fi
 
 # ruby
-configLangArgs8core+=( -l ruby )  # 8-core only.
-runnerLangArgs+=( -l "ruby:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}" )
+if [[ -v "useLanguage[ruby]" ]]; then
+  configLangArgs8core+=(-l ruby) # 8-core only.
+  runnerLangArgs+=(-l "ruby:${GRPC_CORE_REPO}:${GRPC_CORE_COMMIT}")
+fi
 
 buildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" "${configLangArgs8core[@]}"
 buildConfigs "${WORKER_POOL_32CORE}" "${BIGQUERY_TABLE_32CORE}" "${configLangArgs32core[@]}"
 
 # Delete prebuilt images on exit.
 deleteImages() {
-    echo "deleting images on exit"
-    ../test-infra/bin/delete_prebuilt_workers \
+  echo "deleting images on exit"
+  ../test-infra/bin/delete_prebuilt_workers \
     -p "${PREBUILT_IMAGE_PREFIX}" \
     -t "${UNIQUE_IDENTIFIER}"
 }
@@ -165,16 +198,16 @@ trap deleteImages EXIT
 
 # Build and push prebuilt images for running tests.
 time ../test-infra/bin/prepare_prebuilt_workers "${runnerLangArgs[@]}" \
-    -p "${PREBUILT_IMAGE_PREFIX}" \
-    -t "${UNIQUE_IDENTIFIER}" \
-    -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
+  -p "${PREBUILT_IMAGE_PREFIX}" \
+  -t "${UNIQUE_IDENTIFIER}" \
+  -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
 
 # Run tests.
 time ../test-infra/bin/runner \
-    -i "loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
-    -i "loadtest_with_prebuilt_workers_${WORKER_POOL_32CORE}.yaml" \
-    -log-url-prefix "${LOG_URL_PREFIX}" \
-    -polling-interval 5s \
-    -delete-successful-tests \
-    -c "${WORKER_POOL_8CORE}:2" -c "${WORKER_POOL_32CORE}:2" \
-    -o "runner/sponge_log.xml"
+  -i "loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
+  -i "loadtest_with_prebuilt_workers_${WORKER_POOL_32CORE}.yaml" \
+  -log-url-prefix "${LOG_URL_PREFIX}" \
+  -polling-interval 5s \
+  -delete-successful-tests \
+  -c "${WORKER_POOL_8CORE}:2" -c "${WORKER_POOL_32CORE}:2" \
+  -o "runner/sponge_log.xml"
diff --git a/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh b/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh
index 143e923359b..44a67643838 100644
--- a/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh
+++ b/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh
@@ -27,13 +27,13 @@ gcloud auth configure-docker
 # Connect to benchmarks-prod2 cluster.
 gcloud config set project grpc-testing
 gcloud container clusters get-credentials psm-benchmarks-performance \
-    --zone us-central1-b --project grpc-testing
+  --zone us-central1-b --project grpc-testing
 
 # Set up environment variables.
 LOAD_TEST_PREFIX="${KOKORO_BUILD_INITIATOR}"
 # BEGIN differentiate experimental configuration from master configuration.
 if [[ "${KOKORO_BUILD_INITIATOR%%-*}" == kokoro ]]; then
-    LOAD_TEST_PREFIX=kokoro-test
+  LOAD_TEST_PREFIX=kokoro-test
 fi
 BIGQUERY_TABLE_8CORE=e2e_benchmarks.psm_experimental_results_8core
 # END differentiate experimental configuration from master configuration.
@@ -45,9 +45,9 @@ ROOT_DIRECTORY_OF_DOCKERFILES="../test-infra/containers/pre_built_workers/"
 GRPC_GITREF="$(git show --format="%H" --no-patch)"
 # Prebuilt workers for core languages are always built from grpc/grpc.
 if [[ "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
-    GRPC_CORE_GITREF="${KOKORO_GIT_COMMIT}"
+  GRPC_CORE_GITREF="${KOKORO_GIT_COMMIT}"
 else
-    GRPC_CORE_GITREF="$(git ls-remote -h https://github.com/grpc/grpc.git master | cut -f1)"
+  GRPC_CORE_GITREF="$(git ls-remote -h https://github.com/grpc/grpc.git master | cut -f1)"
 fi
 GRPC_JAVA_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-java.git master | cut -f1)"
 # Kokoro jobs run on dedicated pools.
@@ -75,69 +75,69 @@ PSM_IMAGE_TAG=${TEST_INFRA_VERSION}
 
 # Build psm test configurations.
 psmBuildConfigs() {
-    local -r pool="$1"
-    local -r table="$2"
-    local -r proxy_type="$3"
-
-    shift 3
-    tools/run_tests/performance/loadtest_config.py "$@" \
-        -t ./tools/run_tests/performance/templates/loadtest_template_psm_"${proxy_type}"_prebuilt_all_languages.yaml \
-        -s driver_pool="${DRIVER_POOL}" -s driver_image= \
-        -s client_pool="${pool}" -s server_pool="${pool}" \
-        -s big_query_table="${table}" -s timeout_seconds=900 \
-        -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
-        -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
-        -s psm_image_prefix="${PSM_IMAGE_PREFIX}" \
-        -s psm_image_tag="${PSM_IMAGE_TAG}" \
-        -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
-        -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
-        -a ci_jobName="${KOKORO_JOB_NAME}" \
-        -a ci_gitCommit="${GRPC_GITREF}" \
-        -a ci_gitCommit_java="${GRPC_JAVA_GITREF}" \
-        -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
-        -a enablePrometheus=true \
-        --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" -u "${proxy_type}"\
-        -a pool="${pool}" \
-        --category=psm \
-        --allow_client_language=c++ --allow_server_language=c++ \
-        -o "psm_${proxy_type}_loadtest_with_prebuilt_workers_${pool}.yaml"
+  local -r pool="$1"
+  local -r table="$2"
+  local -r proxy_type="$3"
+
+  shift 3
+  tools/run_tests/performance/loadtest_config.py "$@" \
+    -t ./tools/run_tests/performance/templates/loadtest_template_psm_"${proxy_type}"_prebuilt_all_languages.yaml \
+    -s driver_pool="${DRIVER_POOL}" -s driver_image= \
+    -s client_pool="${pool}" -s server_pool="${pool}" \
+    -s big_query_table="${table}" -s timeout_seconds=900 \
+    -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
+    -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
+    -s psm_image_prefix="${PSM_IMAGE_PREFIX}" \
+    -s psm_image_tag="${PSM_IMAGE_TAG}" \
+    -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
+    -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
+    -a ci_jobName="${KOKORO_JOB_NAME}" \
+    -a ci_gitCommit="${GRPC_GITREF}" \
+    -a ci_gitCommit_java="${GRPC_JAVA_GITREF}" \
+    -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
+    -a enablePrometheus=true \
+    --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" -u "${proxy_type}" \
+    -a pool="${pool}" \
+    --category=psm \
+    --allow_client_language=c++ --allow_server_language=c++ \
+    -o "psm_${proxy_type}_loadtest_with_prebuilt_workers_${pool}.yaml"
 }
 
-psmBuildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" proxied -a queue="${WORKER_POOL_8CORE}-proxied"  -l c++ -l java --client_channels=8 --server_threads=16 --offered_loads 100 300 500 700 900 1000 1500 2000 2500 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000 26000 28000 30000
+psmBuildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" proxied -a queue="${WORKER_POOL_8CORE}-proxied" -l c++ -l java --client_channels=8 --server_threads=16 --offered_loads 100 300 500 700 900 1000 1500 2000 2500 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000 26000 28000 30000
 
 psmBuildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" proxyless -a queue="${WORKER_POOL_8CORE}-proxyless" -l c++ -l java --client_channels=8 --server_threads=16 --offered_loads 100 300 500 700 900 1000 1500 2000 2500 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000 26000 28000 30000
 
 # Build regular test configurations.
 buildConfigs() {
-    local -r pool="$1"
-    local -r table="$2"
-    shift 2
-    tools/run_tests/performance/loadtest_config.py "$@" \
-        -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_all_languages.yaml \
-        -s driver_pool="${DRIVER_POOL}" -s driver_image= \
-        -s client_pool="${pool}" -s server_pool="${pool}" \
-        -s big_query_table="${table}" -s timeout_seconds=900 \
-        -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
-        -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
-        -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
-        -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
-        -a ci_jobName="${KOKORO_JOB_NAME}" \
-        -a ci_gitCommit="${GRPC_GITREF}" \
-        -a ci_gitCommit_java="${GRPC_JAVA_GITREF}" \
-        -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
-        -a enablePrometheus=true \
-        --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
-        -a pool="${pool}" --category=psm \
-        --allow_client_language=c++ --allow_server_language=c++ \
-        -o "regular_loadtest_with_prebuilt_workers_${pool}.yaml"
+  local -r pool="$1"
+  local -r table="$2"
+  shift 2
+  tools/run_tests/performance/loadtest_config.py "$@" \
+    -t ./tools/run_tests/performance/templates/loadtest_template_prebuilt_all_languages.yaml \
+    -s driver_pool="${DRIVER_POOL}" -s driver_image= \
+    -s client_pool="${pool}" -s server_pool="${pool}" \
+    -s big_query_table="${table}" -s timeout_seconds=900 \
+    -s prebuilt_image_prefix="${PREBUILT_IMAGE_PREFIX}" \
+    -s prebuilt_image_tag="${UNIQUE_IDENTIFIER}" \
+    -a ci_buildNumber="${KOKORO_BUILD_NUMBER}" \
+    -a ci_buildUrl="${CLOUD_LOGGING_URL}" \
+    -a ci_jobName="${KOKORO_JOB_NAME}" \
+    -a ci_gitCommit="${GRPC_GITREF}" \
+    -a ci_gitCommit_java="${GRPC_JAVA_GITREF}" \
+    -a ci_gitActualCommit="${KOKORO_GIT_COMMIT}" \
+    -a enablePrometheus=true \
+    --prefix="${LOAD_TEST_PREFIX}" -u "${UNIQUE_IDENTIFIER}" -u "${pool}" \
+    -a pool="${pool}" --category=psm \
+    --allow_client_language=c++ --allow_server_language=c++ \
+    -o "regular_loadtest_with_prebuilt_workers_${pool}.yaml"
 }
 
 buildConfigs "${WORKER_POOL_8CORE}" "${BIGQUERY_TABLE_8CORE}" -a queue="${WORKER_POOL_8CORE}-regular" -l c++ -l java --client_channels=8 --server_threads=16 --offered_loads 100 300 500 700 900 1000 1500 2000 2500 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000 26000 28000 30000
 
 # Delete prebuilt images on exit.
 deleteImages() {
-    echo "deleting images on exit"
-    ../test-infra/bin/delete_prebuilt_workers \
+  echo "deleting images on exit"
+  ../test-infra/bin/delete_prebuilt_workers \
     -p "${PREBUILT_IMAGE_PREFIX}" \
     -t "${UNIQUE_IDENTIFIER}"
 }
@@ -145,22 +145,22 @@ trap deleteImages EXIT
 
 # Build and push prebuilt images for running tests.
 time ../test-infra/bin/prepare_prebuilt_workers \
-    -l "cxx:${GRPC_CORE_GITREF}" \
-    -l "java:${GRPC_JAVA_GITREF}" \
-    -p "${PREBUILT_IMAGE_PREFIX}" \
-    -t "${UNIQUE_IDENTIFIER}" \
-    -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
+  -l "cxx:${GRPC_CORE_GITREF}" \
+  -l "java:${GRPC_JAVA_GITREF}" \
+  -p "${PREBUILT_IMAGE_PREFIX}" \
+  -t "${UNIQUE_IDENTIFIER}" \
+  -r "${ROOT_DIRECTORY_OF_DOCKERFILES}"
 
 # Run tests.
 time ../test-infra/bin/runner \
-    -i "psm_proxied_loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
-    -i "psm_proxyless_loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
-    -i "regular_loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
-    -log-url-prefix "${LOG_URL_PREFIX}" \
-    -annotation-key queue \
-    -polling-interval 5s \
-    -delete-successful-tests \
-    -c "${WORKER_POOL_8CORE}-proxied:1" \
-    -c "${WORKER_POOL_8CORE}-proxyless:1" \
-    -c "${WORKER_POOL_8CORE}-regular:1" \
-    -o "runner/sponge_log.xml"
+  -i "psm_proxied_loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
+  -i "psm_proxyless_loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
+  -i "regular_loadtest_with_prebuilt_workers_${WORKER_POOL_8CORE}.yaml" \
+  -log-url-prefix "${LOG_URL_PREFIX}" \
+  -annotation-key queue \
+  -polling-interval 5s \
+  -delete-successful-tests \
+  -c "${WORKER_POOL_8CORE}-proxied:1" \
+  -c "${WORKER_POOL_8CORE}-proxyless:1" \
+  -c "${WORKER_POOL_8CORE}-regular:1" \
+  -o "runner/sponge_log.xml"