diff --git a/src/main/java/xyz/vallat/louis/database/LanguageManager.java b/src/main/java/xyz/vallat/louis/database/LanguageManager.java
index 022812f..387dc66 100644
--- a/src/main/java/xyz/vallat/louis/database/LanguageManager.java
+++ b/src/main/java/xyz/vallat/louis/database/LanguageManager.java
@@ -105,11 +105,11 @@ public final class LanguageManager {
                                    String alpha2b, String english, String french) throws SQLException {
         String insert = "INSERT INTO languages(alpha3_b, alpha3_t, alpha2, english, french) VALUES(?, ?, ?, ?, ?);";
         try (PreparedStatement stmt = connection.prepareStatement(insert)) {
-            stmt.setString(1, alpha3b);
-            stmt.setString(2, alpha3t.isBlank() ? null : alpha3t);
-            stmt.setString(3, alpha2b.isBlank() ? null : alpha2b);
-            stmt.setString(4, english);
-            stmt.setString(5, french);
+            stmt.setString(1, alpha3b.toLowerCase());
+            stmt.setString(2, alpha3t.isBlank() ? null : alpha3t.toLowerCase());
+            stmt.setString(3, alpha2b.isBlank() ? null : alpha2b.toLowerCase());
+            stmt.setString(4, english.toLowerCase());
+            stmt.setString(5, french.toLowerCase());
             stmt.executeUpdate();
         }
     }