2 files changed, 4 insertions, 3 deletions
diff --git a/paper-api-generator/src/main/java/io/papermc/generator/types/goal/MobGoalNames.java b/paper-api-generator/src/main/java/io/papermc/generator/types/goal/MobGoalNames.java
index 2ad5e0ac06..1bd6342f61 100644
--- a/paper-api-generator/src/main/java/io/papermc/generator/types/goal/MobGoalNames.java
+++ b/paper-api-generator/src/main/java/io/papermc/generator/types/goal/MobGoalNames.java
@@ -120,6 +120,7 @@ import org.bukkit.entity.ZombieVillager;
 import java.lang.reflect.Constructor;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
@@ -282,8 +283,8 @@ public class MobGoalNames {
         name = sb.toString();
         name = name.replaceFirst("_", "");
 
-        if (flag && !deobfuscationMap.containsKey(name.toLowerCase()) && !ignored.contains(name)) {
-            System.out.println("need to map " + original + " (" + name.toLowerCase() + ")");
+        if (flag && !deobfuscationMap.containsKey(name.toLowerCase(Locale.ROOT)) && !ignored.contains(name)) {
+            System.out.println("need to map " + original + " (" + name.toLowerCase(Locale.ROOT) + ")");
         }
 
         // did we rename this key?
diff --git a/paper-api-generator/src/main/java/io/papermc/generator/utils/Formatting.java b/paper-api-generator/src/main/java/io/papermc/generator/utils/Formatting.java
index a6c88a8a14..9d938f8cb7 100644
--- a/paper-api-generator/src/main/java/io/papermc/generator/utils/Formatting.java
+++ b/paper-api-generator/src/main/java/io/papermc/generator/utils/Formatting.java
@@ -12,7 +12,7 @@ public final class Formatting {
     private static final Pattern ILLEGAL_FIELD_CHARACTERS = Pattern.compile("[.-/]");
 
     public static String formatKeyAsField(String path) {
-        return ILLEGAL_FIELD_CHARACTERS.matcher(path.toUpperCase(Locale.ENGLISH)).replaceAll("_");
+        return ILLEGAL_FIELD_CHARACTERS.matcher(path.toUpperCase(Locale.ROOT)).replaceAll("_");
     }
 
     public static Comparator<String> ALPHABETIC_KEY_ORDER = alphabeticKeyOrder(path -> path);