diff --git a/install/lang/fa/error.php b/install/lang/fa/error.php
index 3962c7a7928..e8e00eff8df 100644
--- a/install/lang/fa/error.php
+++ b/install/lang/fa/error.php
@@ -31,4 +31,6 @@
 defined('MOODLE_INTERNAL') || die();
 
 $string['cannotfindcomponent'] = 'کامپوننت پیدا نشد';
+$string['cannotsavemd5file'] = 'نمی‌توانم فایل md5 را ذخیره کنم';
+$string['cannotsavezipfile'] = 'نمی‌توانم فایل ZIP را ذخیره کنم';
 $string['missingrequiredfield'] = 'بعضی از فیلدهای ضروری خالی است';
diff --git a/install/lang/lv/error.php b/install/lang/lv/error.php
index 5d8fab28393..123d7e56714 100644
--- a/install/lang/lv/error.php
+++ b/install/lang/lv/error.php
@@ -40,7 +40,7 @@ $string['cannotsavezipfile'] = 'Nevar saglabāt ZIP failu';
 $string['cannotunzipfile'] = 'Nevar atzipot failu';
 $string['componentisuptodate'] = 'Komponents atbilst visjaunākajai versijai.';
 $string['downloadedfilecheckfailed'] = 'Lejupielādētā faila pārbaudes rezultāts nesekmīgs.';
-$string['invalidmd5'] = 'Nederīgs md5';
+$string['invalidmd5'] = 'Pārbaudītais mainīgais bija nepareizs - mēģiniet vēlreiz';
 $string['missingrequiredfield'] = 'Trūkst kāda nepieciešamā lauka';
 $string['wrongdestpath'] = 'Nepareizs mērķa ceļš.';
 $string['wrongsourcebase'] = 'Nepareiza avota URL bāze.';
diff --git a/install/lang/lv/install.php b/install/lang/lv/install.php
index eb533470766..4ec5f415edf 100644
--- a/install/lang/lv/install.php
+++ b/install/lang/lv/install.php
@@ -39,6 +39,7 @@ $string['dataroot'] = 'Datu direktorijs';
 $string['dbprefix'] = 'Tabulu prefikss';
 $string['dirroot'] = 'Moodle direktorijs';
 $string['environmenthead'] = 'Vides pārbaude...';
+$string['errorsinenvironment'] = 'Vides pārbaude neizdevās!';
 $string['installation'] = 'Instalēšana';
 $string['langdownloaderror'] = '“{$a}” valodas pakotne diemžēl netika instalēta. Instalēšana tiks turpināta angļu valodā.';
 $string['memorylimithelp'] = '<p>Pašlaik iestatītais PHP atmiņas apjoma ierobežojums jūsu serverī ir {$a}.</p>
diff --git a/install/lang/mn/moodle.php b/install/lang/mn/moodle.php
index e96eacdfa92..2bdc2f321ba 100644
--- a/install/lang/mn/moodle.php
+++ b/install/lang/mn/moodle.php
@@ -31,6 +31,7 @@
 defined('MOODLE_INTERNAL') || die();
 
 $string['language'] = 'Хэл';
+$string['moodlelogo'] = 'Мүүдл лого';
 $string['next'] = 'Дараагийн';
 $string['previous'] = 'Өмнөх';
 $string['reload'] = 'Дахин ачаалах';