I tried to update laravel version but I think this fix is not released yet.

@ahmedsayedabdelsalam releases are done on Tuesdays.

Great! Thanks.

We've reverted this as this was a breaking change.

Is there any plan to fix that or this is not an issue?

This was the expected behavior and it's unlikely that we'll ever change this.

Hmmm. Most of Excel Sheet Translation packages pull the not translated languages as an empty string value and I think it's logic because the data type for translations is designed to be strings

For me I'll fix it in my project but I suggest making a config key determines when the translator should fallback if an empty strings or null.

Like: 'fallback_when_empty' => true, // translations.php config file

Anyway thanks for your time.