locale_get_plural($count, $langcode = NULL) Returns plural form index for a specific number.

public LocaleConfigManager::isSupported($name)

locale_form_language_admin_edit_form_alter_submit($form, FormStateInterface $form_state) Form submission handler

The request stack. Type: \Symfony\Component\HttpFoundation\RequestStack File

The request stack. Type: \Symfony\Component\HttpFoundation\RequestStack File

_locale_refresh_translations($langcodes, $lids = array()) Refresh related information after string translations

public LocaleConfigManager::updateConfigTranslations(array

public LocaleTranslation::reset()

An associative array indicating what data should be overwritten, if any. Elements of the array: override_options

public LocaleSettingsForm::submitForm(array &$form