added english translation

Reviewed-on: #1

addons/dialogue_manager/game_balloons/head_text.gd

@@ -1,12 +1,15 @@
 extends RichTextLabel
 
 
-# Called when the node enters the scene tree for the first time.
 func _ready() -> void:
+	_update_head_text()
+
+
+func _notification(what: int) -> void:
+	if what == NOTIFICATION_TRANSLATION_CHANGED:
+		_update_head_text()
+
+
+func _update_head_text() -> void:
 	var scene_name = get_tree().current_scene.name
-	text = "/" + scene_name + "/"
-
-
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta: float) -> void:
-	pass
+	text = "/" + tr(String(scene_name)) + "/"