Buying my wife a Dulcimer - string gauges question

My wife has watched me learn the mountain dulcimer for the last week and decided to try mine out. She has never played a stringed instrument but loved the sound. Mine is too big for her, so naturally I ordered a smaller one from Germany for her to learn on. She has tiny hands.

It is a DADD teardrop dulcimer with a shorter fretboard so the scale length is 24 1/4”. Will it use the same replacement strings in DADD tuning, or will I need different gauges for hers because of the shorter scale?

Product link in German metric sizes: https://www.thomann.de/gb/hora_dulcimer_d1211.htm

I have spare USA strings by D’addario. Loop end. EJ64. 12 12 14 22