Make sure that thirdparty is actually loaded before using it's countr…

…y for lang (#32107)

htdocs/adherents/class/adherent.class.php

@@ -3105,11 +3105,14 @@ public function sendReminderForExpiredSubscription($daysbeforeendlist = '10', $f
 						$nbko++;
 						$listofmembersko[$adherent->id] = $adherent->id;
 					} else {
-						$adherent->fetch_thirdparty();
-
-						// Language code to use ($languagecodeformember) is default language of thirdparty, if no thirdparty, the language found from country of member then country of thirdparty, and if still not found we use the language of company.
-						$languagefromcountrycode = getLanguageCodeFromCountryCode($adherent->country_code ? $adherent->country_code : $adherent->thirdparty->country_code);
-						$languagecodeformember = (empty($adherent->thirdparty->default_lang) ? ($languagefromcountrycode ? $languagefromcountrycode : $mysoc->default_lang) : $adherent->thirdparty->default_lang);
+						$thirdpartyres = $adherent->fetch_thirdparty();
+						if ($thirdpartyres === -1 ) {
+							$languagecodeformember = $mysoc->default_lang;
+						} else {
+							// Language code to use ($languagecodeformember) is default language of thirdparty, if no thirdparty, the language found from country of member then country of thirdparty, and if still not found we use the language of company.
+							$languagefromcountrycode = getLanguageCodeFromCountryCode($adherent->country_code ? $adherent->country_code : $adherent->thirdparty->country_code);
+							$languagecodeformember = (empty($adherent->thirdparty->default_lang) ? ($languagefromcountrycode ? $languagefromcountrycode : $mysoc->default_lang) : $adherent->thirdparty->default_lang);
+						}
 
 						// Send reminder email
 						$outputlangs = new Translate('', $conf);