List of available languages

I think that could be done by using PHP's scandir or whatever but then where do you translate "it" to "Italian"?

This post helped me getting it up quick and dirty but does not answer your question really :)

https://mydnic.be/post/laravel-5-and-his-fcking-non-persistent-app-setlocale

Did you find an answer to this ?

This code will do the job

$dir    = '../resources/lang';
$files2 = array_diff(scandir($dir), array('..', '.'));
print_r($files2);

Confirmed works on PHP 5 or greater. Just remember to change the $dir directory to be relative to where-ever you are calling from.

You can eliminate the relative $dir problem with the resource_path('lang') helper function.

For newer Laravel versions (where the lang folder is not in the resources anymore but in the project's base folder) and with some more functionality:

/**
     * @param array array of required name replacements, eg. when you want to replace the 'en_BR' with just 'en', put ['en_BR' => 'en']
     * @return array return an array of available locales, eg. ['en', 'fr']
     */
    private function getAllLocales(array $replacements = []): array { 
             
        $locales = collect(array_diff(
            scandir(base_path('lang')), 
            ['..', '.'] // remove these strings from the result
        ))->filter(fn($item) => !str_contains($item, ".")) // removes all the files (these typically contain a dot in their name)
        ->map(fn($item) => $replacements[$item] ?? $item)->toArray(); // replaces all the given names (as key) in the $replacements argument with the specified new name (as value)

        return array_values($locales);
    }