param languag notat languag notat set doe exist set notat languag languag notat languag notat languag equal languag todo care notat notat languag notat avail old languag notat languag memento memento memento redo notat languag languag todo global current languag notat provid factori set current languag languag undo notat languag old languag todo global current languag notat provid factori set current languag old languag undoabl memento 