diff --git a/libraries/pom.xml b/libraries/pom.xml
index 23fec48075..ee5fb2f977 100644
--- a/libraries/pom.xml
+++ b/libraries/pom.xml
@@ -90,6 +90,11 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-text</artifactId>
+            <version>${commons-text.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
@@ -366,6 +371,7 @@
         <multiverse.version>0.7.0</multiverse.version>
         <cglib.version>3.2.4</cglib.version>
         <commons-lang.version>3.5</commons-lang.version>
+        <commons-text.version>1.1</commons-text.version>
         <commons-beanutils.version>1.9.3</commons-beanutils.version>
         <jasypt.version>1.9.2</jasypt.version>
         <javatuples.version>1.2</javatuples.version>
diff --git a/libraries/src/test/java/com/baeldung/text/DiffTest.java b/libraries/src/test/java/com/baeldung/text/DiffTest.java
new file mode 100644
index 0000000000..95370013b6
--- /dev/null
+++ b/libraries/src/test/java/com/baeldung/text/DiffTest.java
@@ -0,0 +1,18 @@
+package com.baeldung.text;
+
+import org.apache.commons.text.diff.EditScript;
+import org.apache.commons.text.diff.StringsComparator;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class DiffTest {
+    
+    @Test
+    public void whenEditScript_thenCorrect() {
+        StringsComparator cmp = new StringsComparator("ABCFGH", "BCDEFG");
+        EditScript<Character> script = cmp.getScript();
+        int mod = script.getModifications();
+        
+        Assert.assertEquals(4, mod);
+    }
+}
diff --git a/libraries/src/test/java/com/baeldung/text/LongestCommonSubsequenceTest.java b/libraries/src/test/java/com/baeldung/text/LongestCommonSubsequenceTest.java
new file mode 100644
index 0000000000..80ca0cfbba
--- /dev/null
+++ b/libraries/src/test/java/com/baeldung/text/LongestCommonSubsequenceTest.java
@@ -0,0 +1,25 @@
+package com.baeldung.text;
+
+import org.apache.commons.text.similarity.LongestCommonSubsequence;
+import org.apache.commons.text.similarity.LongestCommonSubsequenceDistance;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class LongestCommonSubsequenceTest {
+
+    @Test
+    public void whenCompare_thenCorrect() {
+        LongestCommonSubsequence lcs = new LongestCommonSubsequence();
+        int countLcs = lcs.apply("New York", "New Hampshire");
+        
+        Assert.assertEquals(5, countLcs);
+    }
+    
+    @Test
+    public void whenCalculateDistance_thenCorrect() {
+        LongestCommonSubsequenceDistance lcsd = new LongestCommonSubsequenceDistance();
+        int countLcsd = lcsd.apply("New York", "New Hampshire");
+        
+        Assert.assertEquals(11, countLcsd);
+    }
+}
diff --git a/libraries/src/test/java/com/baeldung/text/StrBuilderTest.java b/libraries/src/test/java/com/baeldung/text/StrBuilderTest.java
new file mode 100644
index 0000000000..a8dbaadc5a
--- /dev/null
+++ b/libraries/src/test/java/com/baeldung/text/StrBuilderTest.java
@@ -0,0 +1,24 @@
+package com.baeldung.text;
+
+import org.apache.commons.text.StrBuilder;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class StrBuilderTest {
+    
+    @Test
+    public void whenReplaced_thenCorrect() {
+        StrBuilder strBuilder = new StrBuilder("example StrBuilder!");
+        strBuilder.replaceAll("example", "new");
+        
+        Assert.assertEquals(new StrBuilder("new StrBuilder!"), strBuilder);
+    }
+    
+    @Test
+    public void whenCleared_thenEmpty() {
+        StrBuilder strBuilder = new StrBuilder("example StrBuilder!");
+        strBuilder.clear();
+        
+        Assert.assertEquals(new StrBuilder(""), strBuilder);
+    }
+}
diff --git a/libraries/src/test/java/com/baeldung/text/StrSubstitutorTest.java b/libraries/src/test/java/com/baeldung/text/StrSubstitutorTest.java
new file mode 100644
index 0000000000..24e6ff59c8
--- /dev/null
+++ b/libraries/src/test/java/com/baeldung/text/StrSubstitutorTest.java
@@ -0,0 +1,23 @@
+package com.baeldung.text;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.commons.text.StrSubstitutor;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class StrSubstitutorTest {
+
+    @Test
+    public void whenSubstituted_thenCorrect() {
+        Map<String, String> substitutes = new HashMap<>();
+        substitutes.put("name", "John");
+        substitutes.put("college", "University of Stanford");
+        String templateString = "My name is ${name} and I am a student at the ${college}.";
+        StrSubstitutor sub = new StrSubstitutor(substitutes);
+        String result = sub.replace(templateString);
+
+        Assert.assertEquals("My name is John and I am a student at the University of Stanford.", result);
+    }
+}
diff --git a/libraries/src/test/java/com/baeldung/text/WordUtilsTest.java b/libraries/src/test/java/com/baeldung/text/WordUtilsTest.java
new file mode 100644
index 0000000000..b9268d67b3
--- /dev/null
+++ b/libraries/src/test/java/com/baeldung/text/WordUtilsTest.java
@@ -0,0 +1,23 @@
+package com.baeldung.text;
+
+import org.apache.commons.text.WordUtils;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class WordUtilsTest {
+
+    @Test
+    public void whenCapitalized_thenCorrect() {
+        String toBeCapitalized = "to be capitalized!";
+        String result = WordUtils.capitalize(toBeCapitalized);
+
+        Assert.assertEquals("To Be Capitalized!", result);
+    }
+    
+    @Test
+    public void whenContainsWords_thenCorrect() {
+        boolean containsWords = WordUtils.containsAllWords("String to search", "to", "search");
+        
+        Assert.assertTrue(containsWords);
+    }
+}