Index: src/wp-admin/network/settings.php =================================================================== --- src/wp-admin/network/settings.php (revision 40555) +++ src/wp-admin/network/settings.php (working copy) @@ -63,7 +63,7 @@ ); // Handle translation install. - if ( ! empty( $_POST['WPLANG'] ) && wp_can_install_language_pack() ) { // @todo: Skip if already installed + if ( ! empty( $_POST['WPLANG'] ) && current_user_can( 'install_languages' ) ) { // @todo: Skip if already installed $language = wp_download_language_pack( $_POST['WPLANG'] ); if ( $language ) { $_POST['WPLANG'] = $language; @@ -342,7 +342,7 @@ 'selected' => $lang, 'languages' => $languages, 'translations' => $translations, - 'show_available_translations' => wp_can_install_language_pack(), + 'show_available_translations' => current_user_can( 'install_languages' ), ) ); ?> Index: src/wp-admin/network/site-new.php =================================================================== --- src/wp-admin/network/site-new.php (revision 40555) +++ src/wp-admin/network/site-new.php (working copy) @@ -66,7 +66,7 @@ if ( isset( $_POST['WPLANG'] ) ) { if ( '' === $_POST['WPLANG'] ) { $meta['WPLANG'] = ''; // en_US - } elseif ( wp_can_install_language_pack() ) { + } elseif ( current_user_can( 'install_languages' ) ) { $language = wp_download_language_pack( wp_unslash( $_POST['WPLANG'] ) ); if ( $language ) { $meta['WPLANG'] = $language; @@ -234,7 +234,7 @@ 'selected' => $lang, 'languages' => $languages, 'translations' => $translations, - 'show_available_translations' => wp_can_install_language_pack(), + 'show_available_translations' => current_user_can( 'install_languages' ), ) ); ?> Index: src/wp-admin/options-general.php =================================================================== --- src/wp-admin/options-general.php (revision 40555) +++ src/wp-admin/options-general.php (working copy) @@ -144,7 +144,7 @@ 'selected' => $locale, 'languages' => $languages, 'translations' => $translations, - 'show_available_translations' => ( ! is_multisite() || is_super_admin() ) && wp_can_install_language_pack(), + 'show_available_translations' => current_user_can( 'install_languages' ), ) ); // Add note about deprecated WPLANG constant. Index: src/wp-admin/options.php =================================================================== --- src/wp-admin/options.php (revision 40555) +++ src/wp-admin/options.php (working copy) @@ -182,14 +182,12 @@ } // Handle translation install. - if ( ! empty( $_POST['WPLANG'] ) && ( ! is_multisite() || is_super_admin() ) ) { // @todo: Skip if already installed + if ( ! empty( $_POST['WPLANG'] ) && current_user_can( 'install_languages' ) ) { // @todo: Skip if already installed require_once( ABSPATH . 'wp-admin/includes/translation-install.php' ); - if ( wp_can_install_language_pack() ) { - $language = wp_download_language_pack( $_POST['WPLANG'] ); - if ( $language ) { - $_POST['WPLANG'] = $language; - } + $language = wp_download_language_pack( $_POST['WPLANG'] ); + if ( $language ) { + $_POST['WPLANG'] = $language; } } } Index: src/wp-admin/update-core.php =================================================================== --- src/wp-admin/update-core.php (revision 40555) +++ src/wp-admin/update-core.php (working copy) @@ -608,15 +608,19 @@ echo '   ' . __( 'Check Again' ) . ''; echo '

'; - if ( $core = current_user_can( 'update_core' ) ) + if ( current_user_can( 'update_core' ) ) { core_upgrade_preamble(); - if ( $plugins = current_user_can( 'update_plugins' ) ) + } + if ( current_user_can( 'update_plugins' ) ) { list_plugin_updates(); - if ( $themes = current_user_can( 'update_themes' ) ) + } + if ( current_user_can( 'update_themes' ) ) { list_theme_updates(); - if ( $core || $plugins || $themes ) + } + if ( current_user_can( 'update_languages' ) ) { list_translation_updates(); - unset( $core, $plugins, $themes ); + } + /** * Fires after the core, plugin, and theme update tables. * @@ -729,7 +733,7 @@ } elseif ( 'do-translation-upgrade' == $action ) { - if ( ! current_user_can( 'update_core' ) && ! current_user_can( 'update_plugins' ) && ! current_user_can( 'update_themes' ) ) + if ( ! current_user_can( 'update_languages' ) ) wp_die( __( 'Sorry, you are not allowed to update this site.' ) ); check_admin_referer( 'upgrade-translations' ); Index: src/wp-includes/capabilities.php =================================================================== --- src/wp-includes/capabilities.php (revision 40555) +++ src/wp-includes/capabilities.php (working copy) @@ -392,6 +392,22 @@ $caps[] = $cap; } break; + case 'install_languages': + case 'update_languages': + if ( ! function_exists( 'wp_can_install_language_pack' ) ) { + require_once( ABSPATH . 'wp-admin/includes/translation-install.php' ); + } + + if ( ! wp_can_install_language_pack() ) { + $caps[] = 'do_not_allow'; + } elseif ( is_multisite() && ! is_super_admin( $user_id ) ) { + $caps[] = 'do_not_allow'; + } elseif ( 'update_languages' === $cap ) { + $caps[] = 'install_languages'; + } else { + $caps[] = $cap; + } + break; case 'activate_plugins': $caps[] = $cap; if ( is_multisite() ) { @@ -826,3 +842,22 @@ } return false; } + +/** + * Filters the user capabilities to grant the 'install_languages' capability as necessary. + * + * A user must have at least one out of the 'update_core', 'install_plugins' and + * 'install_themes' capabilities to qualify for 'install_languages'. + * + * @since 4.8.0 + * + * @param array $allcaps An array of all the user's capabilities. + * @return array Filtered array of the user's capabilities. + */ +function maybe_grant_install_languages_cap( $allcaps ) { + if ( ! empty( $allcaps['update_core'] ) || ! empty( $allcaps['install_plugins'] ) || ! empty( $allcaps['install_themes'] ) ) { + $allcaps['install_languages'] = true; + } + + return $allcaps; +} Index: src/wp-includes/default-filters.php =================================================================== --- src/wp-includes/default-filters.php (revision 40555) +++ src/wp-includes/default-filters.php (working copy) @@ -504,4 +504,7 @@ add_filter( 'oembed_response_data', 'get_oembed_response_data_rich', 10, 4 ); add_filter( 'pre_oembed_result', 'wp_filter_pre_oembed_result', 10, 3 ); +// Capabilities +add_filter( 'user_has_cap', 'maybe_grant_install_languages_cap', 1 ); + unset( $filter, $action ); Index: tests/phpunit/tests/user/capabilities.php =================================================================== --- tests/phpunit/tests/user/capabilities.php (revision 40555) +++ tests/phpunit/tests/user/capabilities.php (working copy) @@ -233,6 +233,8 @@ 'upload_themes' => array( 'administrator' ), 'customize' => array( 'administrator' ), 'add_users' => array( 'administrator' ), + 'install_languages' => array( 'administrator' ), + 'update_languages' => array( 'administrator' ), 'edit_categories' => array( 'administrator', 'editor' ), 'delete_categories' => array( 'administrator', 'editor' ), @@ -261,6 +263,8 @@ 'upload_themes' => array(), 'edit_css' => array(), 'upgrade_network' => array(), + 'install_languages' => array(), + 'update_languages' => array(), 'customize' => array( 'administrator' ), 'delete_site' => array( 'administrator' ),