Is it possible to make a feature to restrict user when key in the text?
In example, make some restriction that user cannot key in sensitive wrods.
I have a better suggestion regards this
How about the user is able to set a fix sentence i.e.
Merry Christmas Family "Text" we wish you the best!
user will be able to type Schnipenckotter or Ji, it will fit itself and the configuration from the font will be set already.
"Text" would be the Text layer that the end user will be able to modify, but the important thing is that the font configuration is tight to the sentence, that way if "Text" is short it will shorten the gap, same thing if its has many characters it will by itself increase gap because its a merge text not over the layer.