diff --git a/src/main/kotlin/main/Form.kt b/src/main/kotlin/main/Form.kt
index 0d1e37b..cd1973b 100644
--- a/src/main/kotlin/main/Form.kt
+++ b/src/main/kotlin/main/Form.kt
@@ -164,6 +164,9 @@ fun formPage(onCancelClick: () -> Unit) {
 
                         val wordsList = loadDatasFromFile().toMutableList()
 
+                        // Transform name to lowercase to avoid duplicates
+                        name.value = name.value.lowercase()
+
                         // Verify if the word already exists in the glossary
                         if (wordsList.any { it.name.equals(name.value, ignoreCase = true) }) {
                             println("Le mot '${name.value}' existe déjà dans le glossaire. Ajout annulé.")