Match UI Text on part of another UI Text

I am trying to match a UI Text onto part of another larger UI Text and I am not sure what I need to get the positioning, size and formatting right. The screenshot illustrates this with a long black text and a shorter passage (“talking”) in another text, which should match the place of the black “talking”.

Anyone an idea how to do that?

Maybe use a script to create the text in the box instead of just typing it in like the picture. The script can build the string dynamically how you choose.

ex:
String text=“This is the long text I am” + variable + “about”;