diff --git a/.github/workflows/maven-regression-tests-ENG.yml b/.github/workflows/maven-regression-tests-ENG.yml
new file mode 100644
index 000000000..8e46a247e
--- /dev/null
+++ b/.github/workflows/maven-regression-tests-ENG.yml
@@ -0,0 +1,33 @@
+name: Maven Regression Tests (eng.elimu.ai)
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  test_rest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-rest -D base.url=http://eng.elimu.ai
+
+  test_ui:
+    needs: test_rest
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-ui -D base.url=http://eng.elimu.ai -D headless=true
diff --git a/.github/workflows/maven-regression-tests-HIN.yml b/.github/workflows/maven-regression-tests-HIN.yml
new file mode 100644
index 000000000..a748d21c6
--- /dev/null
+++ b/.github/workflows/maven-regression-tests-HIN.yml
@@ -0,0 +1,33 @@
+name: Maven Regression Tests (hin.elimu.ai)
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  test_rest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-rest -D base.url=http://hin.elimu.ai
+
+  test_ui:
+    needs: test_rest
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-ui -D base.url=http://hin.elimu.ai -D headless=true
diff --git a/.github/workflows/maven-regression-tests-PROD.yml b/.github/workflows/maven-regression-tests-PROD.yml
deleted file mode 100644
index b5a0ae03c..000000000
--- a/.github/workflows/maven-regression-tests-PROD.yml
+++ /dev/null
@@ -1,82 +0,0 @@
-name: Maven Regression Tests (PROD)
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-
-jobs:
-  test_lang-HIN:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 17
-          cache: maven
-      - run: mvn clean
-      - run: mvn compile
-      - run: mvn verify -P regression-test-rest -D base.url=http://hin.elimu.ai
-      - run: mvn verify -P regression-test-ui -D base.url=http://hin.elimu.ai -D headless=true
-
-  test_lang-TGL:
-    needs: test_lang-HIN
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 17
-          cache: maven
-      - run: mvn clean
-      - run: mvn compile
-      - run: mvn verify -P regression-test-rest -D base.url=http://tgl.elimu.ai
-      - run: mvn verify -P regression-test-ui -D base.url=http://tgl.elimu.ai -D headless=true
-
-  test_lang-THA:
-    needs: test_lang-TGL
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 17
-          cache: maven
-      - run: mvn clean
-      - run: mvn compile
-      - run: mvn verify -P regression-test-rest -D base.url=http://tha.elimu.ai
-      - run: mvn verify -P regression-test-ui -D base.url=http://tha.elimu.ai -D headless=true
-
-  test_lang-VIE:
-    needs: test_lang-THA
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 17
-          cache: maven
-      - run: mvn clean
-      - run: mvn compile
-      - run: mvn verify -P regression-test-rest -D base.url=http://vie.elimu.ai
-      - run: mvn verify -P regression-test-ui -D base.url=http://vie.elimu.ai -D headless=true
-
-  test_lang-ENG:
-    needs: test_lang-VIE
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 17
-          cache: maven
-      - run: mvn clean
-      - run: mvn compile
-      - run: mvn verify -P regression-test-rest -D base.url=http://eng.elimu.ai
-      - run: mvn verify -P regression-test-ui -D base.url=http://eng.elimu.ai -D headless=true
diff --git a/.github/workflows/maven-regression-tests-TGL.yml b/.github/workflows/maven-regression-tests-TGL.yml
new file mode 100644
index 000000000..fccf9cc80
--- /dev/null
+++ b/.github/workflows/maven-regression-tests-TGL.yml
@@ -0,0 +1,33 @@
+name: Maven Regression Tests (tgl.elimu.ai)
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  test_rest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-rest -D base.url=http://tgl.elimu.ai
+
+  test_ui:
+    needs: test_rest
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-ui -D base.url=http://tgl.elimu.ai -D headless=true
diff --git a/.github/workflows/maven-regression-tests-THA.yml b/.github/workflows/maven-regression-tests-THA.yml
new file mode 100644
index 000000000..72ecdfca3
--- /dev/null
+++ b/.github/workflows/maven-regression-tests-THA.yml
@@ -0,0 +1,33 @@
+name: Maven Regression Tests (tha.elimu.ai)
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  test_rest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-rest -D base.url=http://tha.elimu.ai
+
+  test_ui:
+    needs: test_rest
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: maven
+      - run: mvn clean
+      - run: mvn verify -P regression-test-ui -D base.url=http://tha.elimu.ai -D headless=true
diff --git a/pom-dependency-tree.txt b/pom-dependency-tree.txt
index 6a20b32b6..cb8e50418 100644
--- a/pom-dependency-tree.txt
+++ b/pom-dependency-tree.txt
@@ -1,4 +1,4 @@
-ai.elimu:webapp:war:2.5.101-SNAPSHOT
+ai.elimu:webapp:war:2.5.102-SNAPSHOT
 +- ai.elimu:model:jar:model-2.0.97:compile
 |  \- com.google.code.gson:gson:jar:2.13.0:compile
 |     \- com.google.errorprone:error_prone_annotations:jar:2.37.0:compile
diff --git a/src/main/java/ai/elimu/web/content/word/WordListController.java b/src/main/java/ai/elimu/web/content/word/WordListController.java
index a00ed87df..f6ca1dac2 100644
--- a/src/main/java/ai/elimu/web/content/word/WordListController.java
+++ b/src/main/java/ai/elimu/web/content/word/WordListController.java
@@ -1,13 +1,10 @@
 package ai.elimu.web.content.word;
 
 import ai.elimu.dao.EmojiDao;
-import ai.elimu.dao.LetterSoundDao;
 import ai.elimu.dao.WordDao;
 import ai.elimu.entity.content.Emoji;
-import ai.elimu.entity.content.LetterSound;
 import ai.elimu.entity.content.Word;
 
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -27,8 +24,6 @@ public class WordListController {
 
   private final WordDao wordDao;
 
-  private final LetterSoundDao letterSoundDao;
-
   private final EmojiDao emojiDao;
 
   @GetMapping
@@ -39,21 +34,6 @@ public String handleRequest(Model model) {
     model.addAttribute("words", words);
     model.addAttribute("emojisByWordId", getEmojisByWordId());
 
-    List<LetterSound> letterSounds = letterSoundDao.readAllOrderedByUsage();
-    if (!letterSounds.isEmpty()) {
-      LetterSound mostUsedLetterSound = letterSounds.get(0);
-      for (Word word : words) {
-        log.info("word.getText(): " + word.getText());
-        log.info("word.getLetterSounds(): " + word.getLetterSounds());
-        if (word.getLetterSounds().isEmpty()) {
-          // Store temporary letters
-          word.setLetterSounds(Arrays.asList(mostUsedLetterSound, mostUsedLetterSound, mostUsedLetterSound, mostUsedLetterSound, mostUsedLetterSound, mostUsedLetterSound, mostUsedLetterSound, mostUsedLetterSound));
-          wordDao.update(word);
-          log.info("word updated: " + word.getId());
-        }
-      }
-    }
-
     int maxUsageCount = 0;
     for (Word word : words) {
       if (word.getUsageCount() > maxUsageCount) {