Autocomplete translate issue

Hi there,

I've got a question about translation of no results in autocomplete field.

I have set in user profile field: autocomplete (to search school), and if there is no results after typing first a few letters, I have information "No items found." But I don't know where can I find this text to translate from english to my language (screenshot)

I checked translation files, and it seems to be inserted in some .js file.

I'll be very grateful for your help with this small thread!
Best regards!
Adam