diff --git a/src/command/defaults/GiveCommand.php b/src/command/defaults/GiveCommand.php
index aa23475f9..9637937e3 100644
--- a/src/command/defaults/GiveCommand.php
+++ b/src/command/defaults/GiveCommand.php
@@ -59,14 +59,14 @@ class GiveCommand extends VanillaCommand{
 
 		$player = $sender->getServer()->getPlayerByPrefix($args[0]);
 		if($player === null){
-			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%commands.generic.player.notFound"));
+			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%" . KnownTranslationKeys::COMMANDS_GENERIC_PLAYER_NOTFOUND));
 			return true;
 		}
 
 		try{
 			$item = LegacyStringToItemParser::getInstance()->parse($args[1]);
 		}catch(\InvalidArgumentException $e){
-			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%commands.give.item.notFound", [$args[1]]));
+			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%" . KnownTranslationKeys::COMMANDS_GIVE_ITEM_NOTFOUND, [$args[1]]));
 			return true;
 		}
 
@@ -81,7 +81,7 @@ class GiveCommand extends VanillaCommand{
 			try{
 				$tags = JsonNbtParser::parseJson($data);
 			}catch(NbtDataException $e){
-				$sender->sendMessage(new TranslationContainer("commands.give.tagError", [$e->getMessage()]));
+				$sender->sendMessage(new TranslationContainer(KnownTranslationKeys::COMMANDS_GIVE_TAGERROR, [$e->getMessage()]));
 				return true;
 			}
 
@@ -91,7 +91,7 @@ class GiveCommand extends VanillaCommand{
 		//TODO: overflow
 		$player->getInventory()->addItem(clone $item);
 
-		Command::broadcastCommandMessage($sender, new TranslationContainer("%commands.give.success", [
+		Command::broadcastCommandMessage($sender, new TranslationContainer(KnownTranslationKeys::COMMANDS_GIVE_SUCCESS, [
 			$item->getName() . " (" . $item->getId() . ":" . $item->getMeta() . ")",
 			(string) $item->getCount(),
 			$player->getName()
diff --git a/src/command/defaults/VanillaCommand.php b/src/command/defaults/VanillaCommand.php
index c4b821e6d..b12ccf278 100644
--- a/src/command/defaults/VanillaCommand.php
+++ b/src/command/defaults/VanillaCommand.php
@@ -26,6 +26,7 @@ namespace pocketmine\command\defaults;
 use pocketmine\command\Command;
 use pocketmine\command\CommandSender;
 use pocketmine\command\utils\InvalidCommandSyntaxException;
+use pocketmine\lang\KnownTranslationKeys;
 use pocketmine\lang\TranslationContainer;
 use pocketmine\utils\TextFormat;
 use function is_numeric;
@@ -82,11 +83,11 @@ abstract class VanillaCommand extends Command{
 
 		$v = (int) $input;
 		if($v > $max){
-			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%commands.generic.num.tooBig", [$input, (string) $max]));
+			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%" . KnownTranslationKeys::COMMANDS_GENERIC_NUM_TOOBIG, [$input, (string) $max]));
 			return null;
 		}
 		if($v < $min){
-			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%commands.generic.num.tooSmall", [$input, (string) $min]));
+			$sender->sendMessage(new TranslationContainer(TextFormat::RED . "%" . KnownTranslationKeys::COMMANDS_GENERIC_NUM_TOOSMALL, [$input, (string) $min]));
 			return null;
 		}
 
diff --git a/src/event/player/PlayerDeathEvent.php b/src/event/player/PlayerDeathEvent.php
index acfa86a7e..c33f3ee0d 100644
--- a/src/event/player/PlayerDeathEvent.php
+++ b/src/event/player/PlayerDeathEvent.php
@@ -30,6 +30,7 @@ use pocketmine\event\entity\EntityDamageByEntityEvent;
 use pocketmine\event\entity\EntityDamageEvent;
 use pocketmine\event\entity\EntityDeathEvent;
 use pocketmine\item\Item;
+use pocketmine\lang\KnownTranslationKeys;
 use pocketmine\lang\TranslationContainer;
 use pocketmine\player\Player;
 
@@ -88,7 +89,7 @@ class PlayerDeathEvent extends EntityDeathEvent{
 	 * Returns the vanilla death message for the given death cause.
 	 */
 	public static function deriveMessage(string $name, ?EntityDamageEvent $deathCause) : TranslationContainer{
-		$message = "death.attack.generic";
+		$message = KnownTranslationKeys::DEATH_ATTACK_GENERIC;
 		$params = [$name];
 
 		switch($deathCause === null ? EntityDamageEvent::CAUSE_CUSTOM : $deathCause->getCause()){
@@ -96,11 +97,11 @@ class PlayerDeathEvent extends EntityDeathEvent{
 				if($deathCause instanceof EntityDamageByEntityEvent){
 					$e = $deathCause->getDamager();
 					if($e instanceof Player){
-						$message = "death.attack.player";
+						$message = KnownTranslationKeys::DEATH_ATTACK_PLAYER;
 						$params[] = $e->getDisplayName();
 						break;
 					}elseif($e instanceof Living){
-						$message = "death.attack.mob";
+						$message = KnownTranslationKeys::DEATH_ATTACK_MOB;
 						$params[] = $e->getNameTag() !== "" ? $e->getNameTag() : $e->getName();
 						break;
 					}else{
@@ -112,10 +113,10 @@ class PlayerDeathEvent extends EntityDeathEvent{
 				if($deathCause instanceof EntityDamageByEntityEvent){
 					$e = $deathCause->getDamager();
 					if($e instanceof Player){
-						$message = "death.attack.arrow";
+						$message = KnownTranslationKeys::DEATH_ATTACK_ARROW;
 						$params[] = $e->getDisplayName();
 					}elseif($e instanceof Living){
-						$message = "death.attack.arrow";
+						$message = KnownTranslationKeys::DEATH_ATTACK_ARROW;
 						$params[] = $e->getNameTag() !== "" ? $e->getNameTag() : $e->getName();
 						break;
 					}else{
@@ -124,45 +125,45 @@ class PlayerDeathEvent extends EntityDeathEvent{
 				}
 				break;
 			case EntityDamageEvent::CAUSE_SUICIDE:
-				$message = "death.attack.generic";
+				$message = KnownTranslationKeys::DEATH_ATTACK_GENERIC;
 				break;
 			case EntityDamageEvent::CAUSE_VOID:
-				$message = "death.attack.outOfWorld";
+				$message = KnownTranslationKeys::DEATH_ATTACK_OUTOFWORLD;
 				break;
 			case EntityDamageEvent::CAUSE_FALL:
 				if($deathCause instanceof EntityDamageEvent){
 					if($deathCause->getFinalDamage() > 2){
-						$message = "death.fell.accident.generic";
+						$message = KnownTranslationKeys::DEATH_FELL_ACCIDENT_GENERIC;
 						break;
 					}
 				}
-				$message = "death.attack.fall";
+				$message = KnownTranslationKeys::DEATH_ATTACK_FALL;
 				break;
 
 			case EntityDamageEvent::CAUSE_SUFFOCATION:
-				$message = "death.attack.inWall";
+				$message = KnownTranslationKeys::DEATH_ATTACK_INWALL;
 				break;
 
 			case EntityDamageEvent::CAUSE_LAVA:
-				$message = "death.attack.lava";
+				$message = KnownTranslationKeys::DEATH_ATTACK_LAVA;
 				break;
 
 			case EntityDamageEvent::CAUSE_FIRE:
-				$message = "death.attack.onFire";
+				$message = KnownTranslationKeys::DEATH_ATTACK_ONFIRE;
 				break;
 
 			case EntityDamageEvent::CAUSE_FIRE_TICK:
-				$message = "death.attack.inFire";
+				$message = KnownTranslationKeys::DEATH_ATTACK_INFIRE;
 				break;
 
 			case EntityDamageEvent::CAUSE_DROWNING:
-				$message = "death.attack.drown";
+				$message = KnownTranslationKeys::DEATH_ATTACK_DROWN;
 				break;
 
 			case EntityDamageEvent::CAUSE_CONTACT:
 				if($deathCause instanceof EntityDamageByBlockEvent){
 					if($deathCause->getDamager()->getId() === BlockLegacyIds::CACTUS){
-						$message = "death.attack.cactus";
+						$message = KnownTranslationKeys::DEATH_ATTACK_CACTUS;
 					}
 				}
 				break;
@@ -172,20 +173,20 @@ class PlayerDeathEvent extends EntityDeathEvent{
 				if($deathCause instanceof EntityDamageByEntityEvent){
 					$e = $deathCause->getDamager();
 					if($e instanceof Player){
-						$message = "death.attack.explosion.player";
+						$message = KnownTranslationKeys::DEATH_ATTACK_EXPLOSION_PLAYER;
 						$params[] = $e->getDisplayName();
 					}elseif($e instanceof Living){
-						$message = "death.attack.explosion.player";
+						$message = KnownTranslationKeys::DEATH_ATTACK_EXPLOSION_PLAYER;
 						$params[] = $e->getNameTag() !== "" ? $e->getNameTag() : $e->getName();
 						break;
 					}
 				}else{
-					$message = "death.attack.explosion";
+					$message = KnownTranslationKeys::DEATH_ATTACK_EXPLOSION;
 				}
 				break;
 
 			case EntityDamageEvent::CAUSE_MAGIC:
-				$message = "death.attack.magic";
+				$message = KnownTranslationKeys::DEATH_ATTACK_MAGIC;
 				break;
 
 			case EntityDamageEvent::CAUSE_CUSTOM:
diff --git a/src/player/Player.php b/src/player/Player.php
index 3e626fed3..ddc418a78 100644
--- a/src/player/Player.php
+++ b/src/player/Player.php
@@ -355,7 +355,7 @@ class Player extends Human implements CommandSender, ChunkListener, IPlayer{
 	 */
 	public function getLeaveMessage(){
 		if($this->spawned){
-			return new TranslationContainer(TextFormat::YELLOW . "%multiplayer.player.left", [
+			return new TranslationContainer(TextFormat::YELLOW . "%" . KnownTranslationKeys::MULTIPLAYER_PLAYER_LEFT, [
 				$this->getDisplayName()
 			]);
 		}
@@ -799,7 +799,7 @@ class Player extends Human implements CommandSender, ChunkListener, IPlayer{
 		});
 
 		$ev = new PlayerJoinEvent($this,
-			new TranslationContainer(TextFormat::YELLOW . "%multiplayer.player.joined", [
+			new TranslationContainer(TextFormat::YELLOW . "%" . KnownTranslationKeys::MULTIPLAYER_PLAYER_JOINED, [
 				$this->getDisplayName()
 			])
 		);