Translations update from Weblate (#2739)

Co-authored-by: Sérgio Morais <lalocas@protonmail.com>
Co-authored-by: Wellington Terumi Uemura <wellingtonuemura@gmail.com>
Co-authored-by: dkstiler <dkstiler@gmail.com>
Co-authored-by: Yan Kazachkov <yankazachkov@gmail.com>
Co-authored-by: Simona Iacob <s@zp1.net>
Co-authored-by: pisquan8 <cimurro@outlook.de>
Co-authored-by: Maamon AlHaqli <mamon321@hotmail.com>
Co-authored-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Co-authored-by: Krishna Chand <krishna_chand67@naver.com>
Co-authored-by: Anders Johansson <johansson@aljmedia.se>
Co-authored-by: Kevin Papst <kpapst@gmx.net>

translations/validators.el.xlf

@@ -58,6 +58,14 @@
         <source>At least one team leader must be assigned to the team.</source>
         <target>Τουλάχιστο ένας αρχηγός ομάδας πρέπει να ανατεθεί στην ομάδα.</target>
       </trans-unit>
+      <trans-unit id="An equal email is already used.">
+        <source>An equal email is already used.</source>
+        <target>Ένα συνώνυμο όνομα ηλεκτρονικού ταχυδρομείου χρησιμοποιείται ήδη.</target>
+      </trans-unit>
+      <trans-unit id="An equal username is already used.">
+        <source>An equal username is already used.</source>
+        <target>Ένα συνώνυμο όνομα χρήστη χρησιμοποιείται ήδη.</target>
+      </trans-unit>
     </body>
   </file>
 </xliff>