To access the ComboBox, all you have to do is click on the cell with a smiley face, then the USF with the 2 ComboBoxes appears.
I made some necessary modifications for the SpinButton.
What is curious is that if one chooses the Tigrynia language, which is found in the second function, its Latinized transcription appears. I realized that in the second function it occupies position 23. However, in the first function there is a Latinized language which occupies the same position: Bulgarian. There is a kind of interference between these two functions ...