[TASK] Only consider default template files. Language templates now only from db

Classes/Service/MailTemplateService.php

@@ -340,17 +340,13 @@ class MailTemplateService {
 		if ($template === NULL) {
 
 			$templatePath = self::$registerArray[$this->extensionKey][$this->templateName]['templatePath'];
-			$templateFile = $templatePath . $this->language . '.template.html';
-			if (file_exists($templateFile)) {
-				$defaultTemplateContent = file_get_contents($templatePath . $this->language . '.template.html');
-			} else {
-				$defaultTemplateFile = $templatePath . 'template.html';
 
-				if (file_exists($defaultTemplateFile)) {
-					$defaultTemplateContent = file_get_contents($defaultTemplateFile);
-				} else {
-					return FALSE;
-				}
+			// only standard template file is considered since version 4.1
+			$defaultTemplateFile = $templatePath . 'template.html';
+			if (file_exists($defaultTemplateFile)) {
+				$defaultTemplateContent = file_get_contents($defaultTemplateFile);
+			} else {
+				return FALSE;
 			}
 		} elseif (filter_var($template->getToAddress(), FILTER_VALIDATE_EMAIL)) {
 			$this->setToAddresses($template->getToAddress());