Translations, find all phrases

Any idea how to check if all the phrases for translation have their translations? In other words, do all lang("phrases")  in all project files have their values in Language files?

CodeIgniter Shield has test code ported from codeigniter4/translations.
See https://github.com/codeigniter4/shield/t...s/Language

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Thank you! 
I presumed that this problem was already solved.

OK, so if someone needed exactly what I needed - I've prepared a package that will quickly list all the phrases to translate using the CLI.
This is my first open source package. It took me a while to figure out how to publish it, but it seems to work.
https://github.com/clsmedia/ci4-translation-finder

Oh, thanks!
The package seems very useful.

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