Add mod documentation in seven languages

locale/ui_es.properties

@@ -1,6 +1,4 @@
 # --- scenes/battle/winground.tscn ---
-mod_ui_base_name = Interfaz
-mod_ui_base_desc = Subsistema de interfaz del motor: kit de widgets (Widget/ModWidget/listas), visor de fondos ViewBox, barra de herramientas ToolBox, GameMenu/SaveIcon, paneles de notificaciones, el sistema de diseño UiKit y DeviceInput.
 ui/battle/victory = Victoria
 ui/battle/victory/return = Continuar
 ui/battle/victory/loot_title = Botín:
@@ -102,6 +100,7 @@ ui/save/game_day = Día {day}, {time}
 ui/save/party_size = Grupo: {count}
 
 # --- GameMenu ---
+menu/title = Menú
 menu/resume = Continuar
 menu/save = Guardar
 menu/load = Cargar