I organized my language translation folder in Laravel in this way
To access the translation keys in app.php, it's straightforward as described in the Laravel documentation. To access a key from app.php, you can use:
Once I organized the language translations inside a sub-folder, I tried to access in this way.
And it wouldn't work. Laravel documentation does not seem to mention how one can access a key from inside a sub folder. I looked up on Github Issues on the Laravel Repository and found a way to access the key.
This worked out well but the point to notice is that Taylor confirmed that this is not a way that may be supported in the future releases.