Translated using Weblate (#5804)

Co-authored-by: AlaxLima <thanhkhoidangngoc@gmail.com>
Co-authored-by: Arif Budiman <arifpedia@gmail.com>
Co-authored-by: Artem <artemkozhin80@gmail.com>
Co-authored-by: Eleni Diamantopoulou <elenidiama00@gmail.com>
Co-authored-by: Florent Berthelot <florentius.b@gmail.com>
Co-authored-by: Kehribar <103407696+dpentx@users.noreply.github.com>
Co-authored-by: Kevin Papst <kevin@kevinpapst.de>
Co-authored-by: Lasse Edsvik <lasse@lasseedsvik.se>
Co-authored-by: Levente Déri <derilevi@gmail.com>
Co-authored-by: Massimo Pissarello <mapi68@gmail.com>
Co-authored-by: Milo Ivir <mail@milotype.de>
Co-authored-by: Paul <snide-slum-partake@duck.com>
Co-authored-by: Posemartonis <weblate.drainage895@passmail.net>
Co-authored-by: Romhányi-Kakucska Viktor <viktor@romhanyi.dev>
Co-authored-by: irooniline <mart.styff@protonmail.com>
Co-authored-by: leonidovmob <leonidovmob@gmail.com>

translations/invoice-calculator.el.xlf

@@ -38,6 +38,14 @@
         <source>price</source>
         <target state="translated">Τιμή: μια καταχώριση ανά τιμή</target>
       </trans-unit>
+      <trans-unit id="oRa0mkz" resname="activity_user" xml:space="preserve">
+        <source>activity_user</source>
+        <target state="translated">Δραστηριότητα και χρήστης</target>
+      </trans-unit>
+      <trans-unit id="0l1P9cz" resname="date_user" xml:space="preserve">
+        <source>date_user</source>
+        <target state="translated">Ημερομηνία και χρήστης</target>
+      </trans-unit>
     </body>
   </file>
 </xliff>