Provide locale pointer for config connection audience (#13600)

Author: Warriorrrr

paper-server/src/main/java/io/papermc/paper/connection/PaperPlayerConfigurationConnection.java

@@ -8,6 +8,8 @@
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
 import java.util.UUID;
@@ -18,6 +20,7 @@
 import net.kyori.adventure.resource.ResourcePackCallback;
 import net.kyori.adventure.resource.ResourcePackInfo;
 import net.kyori.adventure.resource.ResourcePackRequest;
+import net.kyori.adventure.translation.Translator;
 import net.minecraft.network.chat.Component;
 import net.minecraft.network.protocol.common.ClientboundClearDialogPacket;
 import net.minecraft.network.protocol.common.ClientboundCustomPayloadPacket;
@@ -90,6 +93,7 @@ public Pointers pointers() {
             this.adventurePointers = Pointers.builder()
                 .withDynamic(Identity.NAME, () -> this.handle.getOwner().name())
                 .withDynamic(Identity.UUID, () -> this.handle.getOwner().id())
+                .withDynamic(Identity.LOCALE, () -> Objects.requireNonNullElse(Translator.parseLocale(this.handle.clientInformation.language()), Locale.US))
                 .build();
         }