use OptimistDigital\NovaTranslationsLoader\LoadsNovaTranslations;

class SomePackagesServiceProvider extends ServiceProvider
{
    use LoadsNovaTranslations;

    public function boot()
    {
        // ...

        /**
         * Loads translations into the Nova system.
         *
         * @param string $packageTranslationsDir The directory for the packages' translation files.
         * @param string $packageName The name of the current package (ie 'nova-menu-builder').
         * @param boolean $publishTranslations Whether to also automatically make translations publishable.
         * @return null
         **/

        $this->loadTranslations(__DIR__ . '/../resources/lang', 'nova-package', true);

        // ...
    }
}