custom language package not working

Question

Since the German translation of "Grid" within the german language pack is currently wrong (see here), I wanted to override it using a custom language pack (since you cannot override translations of translation packages within a module or a theme). I used the instructions provided here and also looked at the documentation.

This is what I have so far:

app/code/InspiredMinds/language-de_de/registration.php:

<?php

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::LANGUAGE,
    'InspiredMinds_de_de',
    __DIR__
);

app/code/InspiredMinds/language-de_de/language.xml:

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

app/code/InspiredMinds/language-de_de/de_DE.csv:

"Grid","Raster",module,Magento_Catalog

Instead of

app/code/InspiredMinds/language-de_de

I also tried

app/i18n/InspiredMinds/de_de

I cleaned all caches and also ran a setup:di:compile (in case that is necessary for language packs). It still does not work.

What am I missing?

Answer 1

As mentioned/suspected by @steros, there seems to be a bug with language packs regarding upper case letters within the component name. As far as I tested, the $componentName within registration.php must not contain uppercase letters (to fit the actual vendor and package name for example).

My above code works within

app/i18n/InspiredMinds/de_de

when I use all lower case letters as the component name in the registration.php:

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::LANGUAGE,
    'inspiredminds_de_de',
    __DIR__
);

Everything else can stay in camel cases.

Answer 2

Put everything in:

app/i18n/inspiredminds/de_de

registration:

<?php

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::LANGUAGE,
    'inspiredminds_de_de',
    __DIR__
);

xml:

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

name your csv file de_DE.csv.

You need to run magento setup:static-content:deploy de_DE too depending on your setup.