Added new languages, updated translations, changed sql installation

Separated language in db dump, makes it easier for me to update
Added commit alongside the version in the generated config file

src/installer/pages/3.php

@@ -44,24 +44,39 @@ if (!empty($_POST)) {
     if (isset($dbconfig)) {
         try {
             $db = new Medoo($dbconfig);
-            $sqlfile = $usingMysql ? "dbinstall_mysql" : "dbinstall_sqlite";
-            $sqlquery = file_get_contents(__DIR__ . "/../$sqlfile.sql");
 
-            if($sqlquery === false) {
-                $errormessage = "Cannot read $sqlfile.sql file!";
+            $sqlfiles = [];
+
+            if ($usingMysql) {
+                $sqlfiles = [
+                    "dbinstall_mysql",
+                    "dbinstall_mysql_lang"
+                ];
             } else {
+                // no other option yet
+            }
+
+            foreach ($sqlfiles as $file) {
+                $sqlquery = file_get_contents(__DIR__ . "/../$file.sql");
+
+                if($sqlquery === false) {
+                    throw new Exception("Cannot read SQL file: $file.sql");
+                }
+
                 $sqlquery = str_replace("DBPREFIX", $dbprefix, $sqlquery);
                 $sqlresult = $db->pdo->exec($sqlquery);
 
-                if($sqlresult === false) {
+                if ($sqlresult === false) {
                     throw new Exception("EXEC returned false");
                 }
+            }
 
+            // if all queries succeeded, create a config file and save connection info there
             $phpcode = <<<EOT
 <?php
 /*
  * TS-website database config file
- * Generated at %s with TS-website %s
+ * Generated at %s with TS-website %s (%s)
  */
 
 return [
@@ -80,14 +95,14 @@ EOT;
             $confarray = rtrim($confarray, "," . PHP_EOL);
 
             // Replace all variables with sprintf
-                $phpcode = sprintf($phpcode, date("d-m-Y H:i:s"), __TSWEBSITE_VERSION, $confarray);
+            $phpcode = sprintf($phpcode, date("d-m-Y H:i:s"), __TSWEBSITE_VERSION, __TSWEBSITE_COMMIT, $confarray);
 
             if(file_put_contents(__CONFIG_FILE, $phpcode) === false) {
                 $errormessage = "Cannot write to <code>" . __CONFIG_FILE . "</code>! Please check the file/directory permissions";
             } else {
+                // redirect to next step on success
                 header("Location: ?step=" . ($stepNumber + 1));
             }
-            }
         } catch (Exception $e) {
             $errormessage = htmlspecialchars("Error " . $e->getCode() . ": " . $e->getMessage());