Language pack inheritance order is incorrect

[koenner01]

Direct quote from the Magento 2 documentation:
(http://devdocs.magento.com/guides/v2.0/config-guide/cli/config-cli-subcommands-i18n.html)

If necessary, you can specify several parent packages. The parent packages are applied on a first listed, first used basis.

And

In the preceding example:

language_package_one descends from en_au_package and en_au_package descends from en_ie_package
language_package_two descends from en_ca_package and en_ca_package descends from en_us_package
If the Magento application cannot find word or phrase in the en_GB package, it looks in other packages in following sequence:

parent-package-one/language_package_one
/en_au_package
/en_ie_package
parent-package-two/language_package_two
/en_ca_package
/en_us_package
Specifying all inheritances between the language packages might result in creating circular inheritance chains. Use Magento\Test\Integrity\App\Language\CircularDependencyTest test to locate and fix such chains.

The documentation clearly states that 'package_one' should be loaded before 'package_two'; However if your 'package_one' name comes after 'package_two' alphabetically the order will not be respected.

Preconditions

1. Magento 2.4-develop
2. PHP7.2

Steps to reproduce

1. Create 2 language packs with package names "pack_a" & "pack_z"
2. Create a project language pack which uses the previously created packs.
3. Make sure you add "pack_z" as the first package to use then "pack_a"

<?xml version="1.0"?>
<language xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/Language/package.xsd">
   ...
    <use vendor="myvendor" package="pack_z"/>
    <use vendor="myvendor" package="pack_a"/>
</language>

Expected result

1. Translations should be firstly fetched from "pack_z" then "pack_a"

Actual result

1. Translations are firstly fetched from "pack_a" then from "pack_z"

[magento-engcom-team]

@koenner01, thank you for your report.
We've created internal ticket(s) MAGETWO-83802 to track progress on the issue.