Read status of a toggle mode in a software

[anhnha]

I am using a small Unikey software from http://unikey.vn/vietnam/#nav4 to type Vietnamese in Telex mode. The software has a hot key ctrl + shift to toggle between Vietnamese and English mode.
I have an autohotkey program that needs to know the status of Unikey whether it is in English or Vietnamese mode.
I tried use ImageSearch but it is too cumbersome and its is not adaptive to every computer. Does anyone know any method to read it status?

[YMP2]

If that mode is the same for all windows, put its initial state in a variable and toggle it each time you press Ctrl+Shift. That way you will know its current state.

If it's different for each window, then it's more complex because you will have to maintain such a variable for each window, but it's also feasible.