Translated using Weblate (#3723)

Co-authored-by: Allan Nordhøy <epost@anotheragency.no>
Co-authored-by: Dan <denqwerta@gmail.com>
Co-authored-by: Kevin Papst <kevin@kevinpapst.de>
Co-authored-by: Magdalena Turek <magdalena.2rek@gmail.com>
Co-authored-by: Oğuz Ersen <oguz@ersen.moe>
Co-authored-by: Sergii Horichenko <m@sgg.im>
Co-authored-by: Sima Teimourianmotlagh <simateimourian@gmail.com>
Co-authored-by: Wellington Terumi Uemura <wellingtonuemura@gmail.com>
Co-authored-by: Yaron Shahrabani <sh.yaron@gmail.com>
Co-authored-by: gallegonovato <fran-carro@hotmail.es>
Co-authored-by: gnu-ewm <gnu.ewm@protonmail.com>
Co-authored-by: h <tachyglossues@gmail.com>
Co-authored-by: yangyangdaji <1504305527@qq.com>

translations/validators.en.xlf

@@ -11,8 +11,8 @@
         <target>The entered passwords don't match.</target>
       </trans-unit>
       <trans-unit id="6u6oCwB" resname="The email is already used.">
-        <source>The email is already used.</source>
-        <target>The email is already used.</target>
+        <source>This e-mail address is already in use.</source>
+        <target state="translated">This e-mail address is already in use.</target>
       </trans-unit>
       <trans-unit id="S14XECA" resname="The username is already used.">
         <source>The username is already used.</source>
@@ -23,8 +23,8 @@
         <target>An equal username is already used.</target>
       </trans-unit>
       <trans-unit id="INlaCgW" resname="An equal email is already used.">
-        <source>An equal email is already used.</source>
-        <target>An equal email is already used.</target>
+        <source>An equal e-mail address is already i use.</source>
+        <target state="translated">An equal e-mail address is already i use.</target>
       </trans-unit>
       <trans-unit id="IkNxbBI" resname="This value is not a valid role.">
         <source>This value is not a valid role.</source>