diff --git a/install/lang/gl/error.php b/install/lang/gl/error.php
index dfa4b2584aa..06f0cb7decd 100644
--- a/install/lang/gl/error.php
+++ b/install/lang/gl/error.php
@@ -30,6 +30,9 @@
 
 defined('MOODLE_INTERNAL') || die();
 
+$string['cannotcreatedboninstall'] = '<p>Non é posíbel crear a base de datos.</p>
+<p>A base de datos especificada non existe e o usuario indicado non ten permiso para crear a base de datos.</p>
+<p>O administrador do sitio debería verificar a configuración da base de datos.</p>';
 $string['cannotcreatelangdir'] = 'Non se pode crear o directorio de idioma';
 $string['cannotcreatetempdir'] = 'Non se pode crear un directorio temporal';
 $string['cannotdownloadcomponents'] = 'Non foi posíbel descargar compoñentes';
@@ -39,9 +42,12 @@ $string['cannotsavemd5file'] = 'Non é posíbel gardar o ficheiro md5';
 $string['cannotsavezipfile'] = 'Non é posíbel gardar o ficheiro ZIP';
 $string['cannotunzipfile'] = 'Non é posíbel descomprimir o ficheiro';
 $string['componentisuptodate'] = 'O compoñente está actualizado';
+$string['dmlexceptiononinstall'] = '<p>Produciuse un erro na base de datos [{$a->errorcode}].<br />{$a->debuginfo}</p>';
 $string['downloadedfilecheckfailed'] = 'A comprobación do ficheiro descargado non foi satisfactoria';
 $string['invalidmd5'] = 'md5 non válido';
 $string['missingrequiredfield'] = 'Falta algún campo obrigatorio';
+$string['remotedownloaderror'] = '<p>Fallo a descarga do compoñente cara o seu servidor. Recomendase encarecidamente que verifiqoe os axustes do proxy, extensión PHP cURL.</p>
+<p>Debe descargar o ficheiro <a href="{$a->url}">{$a->url}</a> manualmente, copialo en «{$a->dest}» no seu servidor e descomprimilo alí.</p>';
 $string['wrongdestpath'] = 'Camiño de destino errado.';
 $string['wrongsourcebase'] = 'URL da fonte errado.';
 $string['wrongzipfilename'] = 'Nome de ficheiro ZIP errado.';
diff --git a/install/lang/sr/langconfig.php b/install/lang/sr/langconfig.php
deleted file mode 100644
index 9e1d4de06ca..00000000000
--- a/install/lang/sr/langconfig.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-
-/**
- * Automatically generated strings for Moodle installer
- *
- * Do not edit this file manually! It contains just a subset of strings
- * needed during the very first steps of installation. This file was
- * generated automatically by export-installer.php (which is part of AMOS
- * {@link http://docs.moodle.org/dev/Languages/AMOS}) using the
- * list of strings defined in /install/stringnames.txt.
- *
- * @package   installer
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
-defined('MOODLE_INTERNAL') || die();
-
-$string['thisdirection'] = 'ltr';
-$string['thislanguage'] = 'Српски';
diff --git a/install/lang/sr_cr_bo/langconfig.php b/install/lang/sr_cr_bo/langconfig.php
deleted file mode 100644
index 9e1d4de06ca..00000000000
--- a/install/lang/sr_cr_bo/langconfig.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-
-/**
- * Automatically generated strings for Moodle installer
- *
- * Do not edit this file manually! It contains just a subset of strings
- * needed during the very first steps of installation. This file was
- * generated automatically by export-installer.php (which is part of AMOS
- * {@link http://docs.moodle.org/dev/Languages/AMOS}) using the
- * list of strings defined in /install/stringnames.txt.
- *
- * @package   installer
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
-defined('MOODLE_INTERNAL') || die();
-
-$string['thisdirection'] = 'ltr';
-$string['thislanguage'] = 'Српски';