[Tkinter] tkinter.Menu – How to make text-variable?

[Sir]

Problem context:
"tkinter" module has its own mutable alternatives for str, int, ... .
They are StringVar, IntVar, ... .
Widgets like Button, Label, ... do support them.
One can pass StringVar object to a widget via textvariable parameter.
Eg.

tkinter.Button(master= tkinter.Tk(), textvariable= tkinter.StringVar())

But, here tkinter.Menu stands out.
All its nested “widgets“ are loaded with .add_command(), .add_cascade(), ... methods.
Unfortunately, I don't know all their parameters, therefore, if someone posts a link to them they will have my gratitude.
Anyway, instead of having textvariable parameter, they possess label and [command or menu or sth].
Eg.

from tkinter import *
Win= Tk()
Menu1= Menu(master= Win)
Menu1.add_command(label= "My text.", command= print)
Menu1.add_cascade(label= "My another text.", menu= Menu(Menu1))
Win.configure(menu= Menu1)
Win.mainloop()

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My purpose:
I'm making a multilingual object-orientet game. Which has a dictionary full of StringVar-s which change their value each time a user changes languages (I want to make a pull-down menu with languages). Widgets have textvariable-s connected with my dictionary. Dictionary draws values for StringVar-s from sqlite3 database, when language changes. Everything works for every widget, except for the Menu.

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What I need:
I want my menubar to also be labelled with StringVar-s, so that I can keep a collection (dictionary) with references to these objects with their values. I would like to control the labels via my dictionary. #Update: Yes, I know I can rebuild the menu or change its properties on every dictionary shift. Eventually I may create such a method for my menubar, which would provide integrity if I cannot use StringVars.
Eg.

from tkinter import *
Win= Tk()
Mydict= {"command": StringVar(master= Win)}
Menu1= Menu(master= Win)
Menu1.add_command(label= Mydict["command"], command= print)

This doesn't work obviously.

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Questions:
Does anyone know how to get StringVar-s into menu?
Does anyone know more parameters for tkinter.Menu's .add_...() methods.
#Update: I've got to know a Menubutton, which can hold StringVar(), but its children (content) are still problematic. Can I pack a normal widget into Menu? Eg. button, that would solve the problem. How?