Pass a dynamic value to `App text(?)`

Is it possible to pass a parameter when looking up text via App text(?)?
From what I can see, you can only select one of the user defined options

App Text are defined in Settings->Languages tab.
I think only defined options are possible


Correct, you define the language manually in settings. I’m talking about being able to retrieve it dynamically.
Just to give you an exaple, let’s say I have the following language variables defined:

GREETING_NEW = "welcome"
GEETING_EXISTING = "welcome back"

and I want to be able to use something like first login yes/no flag on the user to select one of these greetings.
App text(Current user's first login formatted as text)
Again, this isn’t the actual use case, just an example

Don’t think that is possible yet

I think you’re correct