diff --git a/src/main/java/com/codedead/opal/controller/LanguageController.java b/src/main/java/com/codedead/opal/controller/LanguageController.java
index 6f3c766..6395064 100644
--- a/src/main/java/com/codedead/opal/controller/LanguageController.java
+++ b/src/main/java/com/codedead/opal/controller/LanguageController.java
@@ -22,7 +22,7 @@ public static int getLanguageIndexFromLocale(final String locale) {
             case "de-de" -> 1;
             case "es-es" -> 2;
             case "fr-fr" -> 3;
-            case "hi" -> 4;
+            case "hi-in" -> 4;
             case "jp-jp" -> 5;
             case "nl-nl" -> 6;
             case "ru-ru" -> 7;
@@ -43,7 +43,7 @@ public static String getLocaleFromLanguageIndex(final int index) {
             case 1 -> "de-DE";
             case 2 -> "es-ES";
             case 3 -> "fr-FR";
-            case 4 -> "hi";
+            case 4 -> "hi-in";
             case 5 -> "jp-JP";
             case 6 -> "nl-NL";
             case 7 -> "ru-RU";
diff --git a/src/main/resources/audio/rollercoaster.mp3 b/src/main/resources/audio/rollercoaster.mp3
new file mode 100644
index 0000000..fbffc73
Binary files /dev/null and b/src/main/resources/audio/rollercoaster.mp3 differ
diff --git a/src/main/resources/translations/OpalApplication.properties b/src/main/resources/translations/OpalApplication.properties
index a935e42..a09af21 100644
--- a/src/main/resources/translations/OpalApplication.properties
+++ b/src/main/resources/translations/OpalApplication.properties
@@ -99,3 +99,4 @@ FastMetronome=Metronome (fast)
 PlayPause=Play / Pause
 PlayPauseError=Unable to play / pause!
 Dolphins=Dolphins
+RollerCoaster=Roller coaster
diff --git a/src/main/resources/translations/OpalApplication_de_DE.properties b/src/main/resources/translations/OpalApplication_de_DE.properties
index 618e1ba..b5bdc8b 100644
--- a/src/main/resources/translations/OpalApplication_de_DE.properties
+++ b/src/main/resources/translations/OpalApplication_de_DE.properties
@@ -99,3 +99,4 @@ FastMetronome=Schnelles Metronom
 PlayPause=Abspielen / Pause
 PlayPauseError=Abspielen / Pause konnte nicht ausgeführt werden!
 Dolphins=Delfine
+RollerCoaster=Achterbahn
diff --git a/src/main/resources/translations/OpalApplication_es_ES.properties b/src/main/resources/translations/OpalApplication_es_ES.properties
index b1beac2..0042512 100644
--- a/src/main/resources/translations/OpalApplication_es_ES.properties
+++ b/src/main/resources/translations/OpalApplication_es_ES.properties
@@ -99,3 +99,4 @@ FastMetronome=Metronomo rápido
 PlayPause=Reproducir / Pausa
 PlayPauseError=¡No se puede reproducir / pausar el sonido!
 Dolphins=Delfines
+RollerCoaster=Montaña rusa
diff --git a/src/main/resources/translations/OpalApplication_fr_FR.properties b/src/main/resources/translations/OpalApplication_fr_FR.properties
index e1fafdb..af3496c 100644
--- a/src/main/resources/translations/OpalApplication_fr_FR.properties
+++ b/src/main/resources/translations/OpalApplication_fr_FR.properties
@@ -99,3 +99,4 @@ FastMetronome=Métronome rapide
 PlayPause=Lecture / Pause
 PlayPauseError=Impossible de lire / mettre en pause!
 Dolphins=Dauphins
+RollerCoaster=Montagnes russes
diff --git a/src/main/resources/translations/OpalApplication_hi.properties b/src/main/resources/translations/OpalApplication_hi_IN.properties
similarity index 99%
rename from src/main/resources/translations/OpalApplication_hi.properties
rename to src/main/resources/translations/OpalApplication_hi_IN.properties
index eaa3549..c838071 100644
--- a/src/main/resources/translations/OpalApplication_hi.properties
+++ b/src/main/resources/translations/OpalApplication_hi_IN.properties
@@ -99,3 +99,4 @@ FastMetronome=मेट्रोनोम (तेज़)
 PlayPause=चालू करे रोके
 PlayPauseError=चलाने/रोकने में असमर्थ!
 Dolphins=डाल्फिन
+RollerCoaster=रोलर कोस्टर
diff --git a/src/main/resources/translations/OpalApplication_jp_JP.properties b/src/main/resources/translations/OpalApplication_jp_JP.properties
index 8f6547d..dde0c71 100644
--- a/src/main/resources/translations/OpalApplication_jp_JP.properties
+++ b/src/main/resources/translations/OpalApplication_jp_JP.properties
@@ -99,3 +99,4 @@ FastMetronome=速いメトロノーム
 PlayPause=再生/一時停止
 PlayPauseError=再生/一時停止できません!
 Dolphins=イルカ
+RollerCoaster=ローラーコースター
diff --git a/src/main/resources/translations/OpalApplication_nl_NL.properties b/src/main/resources/translations/OpalApplication_nl_NL.properties
index 7ba008a..83b8381 100644
--- a/src/main/resources/translations/OpalApplication_nl_NL.properties
+++ b/src/main/resources/translations/OpalApplication_nl_NL.properties
@@ -99,3 +99,4 @@ FastMetronome=Metronoom (snel)
 PlayPause=Afspelen / Pauzeren
 PlayPauseError=Kan niet afspelen / pauzeren!
 Dolphins=Dolfijnen
+RollerCoaster=Achtbaan
diff --git a/src/main/resources/translations/OpalApplication_ru_RU.properties b/src/main/resources/translations/OpalApplication_ru_RU.properties
index e481e71..8989af3 100644
--- a/src/main/resources/translations/OpalApplication_ru_RU.properties
+++ b/src/main/resources/translations/OpalApplication_ru_RU.properties
@@ -99,3 +99,4 @@ FastMetronome=Быстрый метроном
 PlayPause=Воспроизведение / Пауза
 PlayPauseError=Невозможно воспроизвести / приостановить воспроизведение!
 Dolphins=Дельфины
+RollerCoaster=Американские горки
diff --git a/src/main/resources/translations/OpalApplication_tr_TR.properties b/src/main/resources/translations/OpalApplication_tr_TR.properties
index 08cb666..053076c 100644
--- a/src/main/resources/translations/OpalApplication_tr_TR.properties
+++ b/src/main/resources/translations/OpalApplication_tr_TR.properties
@@ -99,3 +99,4 @@ FastMetronome=Hızlı metronom
 PlayPause=Oynat / Duraklat
 PlayPauseError=Oynatma / Duraklatma düğmesi oluşturulamıyor!
 Dolphins=Yunuslar
+RollerCoaster=Lunapark treni
diff --git a/src/main/resources/translations/OpalApplication_zh_CN.properties b/src/main/resources/translations/OpalApplication_zh_CN.properties
index 144e64d..2afae4a 100644
--- a/src/main/resources/translations/OpalApplication_zh_CN.properties
+++ b/src/main/resources/translations/OpalApplication_zh_CN.properties
@@ -99,3 +99,4 @@ FastMetronome=快节拍器
 PlayPause=播放 / 暂停
 PlayPauseError=无法播放 / 暂停！
 Dolphins=海豚
+RollerCoaster=过山车
diff --git a/src/main/resources/windows/MainWindow.fxml b/src/main/resources/windows/MainWindow.fxml
index 7fcbb58..0463ad8 100644
--- a/src/main/resources/windows/MainWindow.fxml
+++ b/src/main/resources/windows/MainWindow.fxml
@@ -415,6 +415,7 @@
                     <RowConstraints vgrow="ALWAYS"/>
                     <RowConstraints vgrow="ALWAYS"/>
                     <RowConstraints vgrow="ALWAYS"/>
+                    <RowConstraints vgrow="ALWAYS"/>
                 </rowConstraints>
 
                 <columnConstraints>
@@ -430,22 +431,25 @@
                 <SoundPane GridPane.rowIndex="2" name="%Sleepy"
                            mediaKey="sleepy" mediaPath="/audio/sleepy.mp3"
                            image="/images/sleepy.png"/>
-                <SoundPane GridPane.rowIndex="3" name="%Gong"
+                <SoundPane GridPane.rowIndex="3" name="%RollerCoaster"
+                           mediaKey="train" mediaPath="/audio/rollercoaster.mp3"
+                           image="/images/train.png"/>
+                <SoundPane GridPane.rowIndex="4" name="%Gong"
                            mediaKey="gong" mediaPath="/audio/gong.mp3"
                            image="/images/gong.png"/>
-                <SoundPane GridPane.rowIndex="4" name="%BellTower"
+                <SoundPane GridPane.rowIndex="5" name="%BellTower"
                            mediaKey="belltower" mediaPath="/audio/belltower.mp3"
                            image="/images/belltower.png"/>
-                <SoundPane GridPane.rowIndex="5" name="%Space"
+                <SoundPane GridPane.rowIndex="6" name="%Space"
                            mediaKey="space" mediaPath="/audio/space.mp3"
                            image="/images/space.png"/>
-                <SoundPane GridPane.rowIndex="6" name="%Train"
+                <SoundPane GridPane.rowIndex="7" name="%Train"
                            mediaKey="train" mediaPath="/audio/train.mp3"
                            image="/images/train.png"/>
-                <SoundPane GridPane.rowIndex="7" name="%SlowMetronome"
+                <SoundPane GridPane.rowIndex="8" name="%SlowMetronome"
                            mediaKey="slowmetronome" mediaPath="/audio/metronome.mp3"
                            image="/images/metronome.png"/>
-                <SoundPane GridPane.rowIndex="8" name="%FastMetronome"
+                <SoundPane GridPane.rowIndex="9" name="%FastMetronome"
                            mediaKey="fastmetronome" mediaPath="/audio/metronomefast.mp3"
                            image="/images/metronome.png"/>
             </GridPane>