diff --git a/clients/src/main/java/org/apache/kafka/clients/NetworkClient.java b/clients/src/main/java/org/apache/kafka/clients/NetworkClient.java
index 7f184b6c72c91..7d3b713e00ed6 100644
--- a/clients/src/main/java/org/apache/kafka/clients/NetworkClient.java
+++ b/clients/src/main/java/org/apache/kafka/clients/NetworkClient.java
@@ -1761,7 +1761,7 @@ public ClientRequest newClientRequest(String nodeId,
     // visible for testing
     int nextCorrelationId() {
         if (SaslClientAuthenticator.isReserved(correlation)) {
-            // the numeric overflow is fine as negative values is acceptable
+            // the numeric overflow is fine as negative values are acceptable
             correlation = SaslClientAuthenticator.MAX_RESERVED_CORRELATION_ID + 1;
         }
         return correlation++;
diff --git a/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java b/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java
index 125392c20af9e..9e11320d358a3 100644
--- a/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java
+++ b/clients/src/main/java/org/apache/kafka/clients/admin/DescribeClusterResult.java
@@ -55,7 +55,7 @@ public KafkaFuture<Collection<Node>> nodes() {
     /**
      * Returns a future which yields the current controller node.
      * <p>
-     * When using {@link AdminClientConfig#BOOTSTRAP_SERVERS_CONFIG}, the controller refer to a random broker.
+     * When using {@link AdminClientConfig#BOOTSTRAP_SERVERS_CONFIG}, the controller refers to a random broker.
      * When using {@link AdminClientConfig#BOOTSTRAP_CONTROLLERS_CONFIG}, it refers to the current voter leader.
      */
     public KafkaFuture<Node> controller() {
diff --git a/clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java b/clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java
index f6581810384a3..6937d3102c162 100644
--- a/clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java
+++ b/clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java
@@ -152,7 +152,7 @@ public AbstractConfig(ConfigDef definition, Map<?, ?> originals, boolean doLog)
     }
 
     /**
-     * Called directly after user configs got parsed (and thus default values is not set).
+     * Called directly after user configs got parsed (and thus default values are not set).
      * This allows to check user's config.
      *
      * @param parsedValues unmodifiable map of current configuration
diff --git a/clients/src/main/java/org/apache/kafka/common/config/ConfigDef.java b/clients/src/main/java/org/apache/kafka/common/config/ConfigDef.java
index 5efcfec246916..3554fdf13be04 100644
--- a/clients/src/main/java/org/apache/kafka/common/config/ConfigDef.java
+++ b/clients/src/main/java/org/apache/kafka/common/config/ConfigDef.java
@@ -521,7 +521,7 @@ public Map<String, Object> parse(Map<?, ?> props) {
         List<String> undefinedConfigKeys = undefinedDependentConfigs();
         if (!undefinedConfigKeys.isEmpty()) {
             String joined = undefinedConfigKeys.stream().map(String::toString).collect(Collectors.joining(","));
-            throw new ConfigException("Some configurations in are referred in the dependents, but not defined: " + joined);
+            throw new ConfigException("Some configurations are referred to in the dependents but not defined: " + joined);
         }
         // parse all known keys
         Map<String, Object> values = new HashMap<>();
diff --git a/clients/src/main/java/org/apache/kafka/common/metrics/PluginMetrics.java b/clients/src/main/java/org/apache/kafka/common/metrics/PluginMetrics.java
index 9633e90745f7b..36df636fb2c3c 100644
--- a/clients/src/main/java/org/apache/kafka/common/metrics/PluginMetrics.java
+++ b/clients/src/main/java/org/apache/kafka/common/metrics/PluginMetrics.java
@@ -24,7 +24,7 @@
 
 /**
  * This allows plugins to register metrics and sensors.
- * Any metrics registered by the plugin are automatically removed when the plugin  closed.
+ * Any metrics registered by the plugin are automatically removed when the plugin is closed.
  */
 @InterfaceAudience.Public
 public interface PluginMetrics {