Ability to specify words that appear in an image

Using Firefly 'Text to image', it is beneficial to specify words you want to appear, for example - cake with the words happy birthday. Using this example most of my attempts do not show the words accurately. They may be mispelled, include characters before or aftter, or just have unknown characters appearing. Perhaps having the words in quotes would be a way to specify that they are text to appear in the image. Adding a name like "Happy Birthday Dean" confused Firefly even more. I had to regenerate multiple times to get even part of the name "Dean" to appear.

Is there any plan to have a way to combine the 'Text to image' with 'Text effects'to generate one image?