TYPO3 Core

Hi,

to extend the site language with an own field is possible like it is explained here

https://docs.typo3.org/m/typo3/reference-coreapi/master/en-us/ApiOverview/SiteHandling/ExtendingSiteConfig.html

Add a file Configuration\SiteConfiguration\Overrides\sites.php and inside

// Configure a new simple required input field to site
$GLOBALS['SiteConfiguration']['site_language']['columns']['myNewField'] = [
    'label' => 'A new custom field',
    'config' => [
        'type' => 'input',
    ],
];

// And add it to showitem
$GLOBALS['SiteConfiguration']['site_language']['types']['1']['showitem'] = str_replace(
    'flag,',
    'myNewField, flag,',
    $GLOBALS['SiteConfiguration']['site_language']['types']['1']['showitem']
);

But there is no way to read the value of the myNewField.

For the site configuration there is a public method getConfiguration(). It would be great to have the same for the SiteLanguage.