diff --git a/src/i18n/messages/ar.json b/src/i18n/messages/ar.json
index cf5dd3c9..7b65928e 100644
--- a/src/i18n/messages/ar.json
+++ b/src/i18n/messages/ar.json
@@ -114,6 +114,7 @@
   "registration.username.label": "Public username",
   "registration.password.label": "Password",
   "registration.country.label": "Country/Region",
+  "registration.opt.in.label": "Receive marketing emails",
   "help.text.name": "This name will be used by any certificates that you earn.",
   "help.text.username.1": "The name that will identify you in your courses.",
   "help.text.username.2": "This can not be changed later.",
diff --git a/src/i18n/messages/es_419.json b/src/i18n/messages/es_419.json
index 97d12a5d..755a1060 100644
--- a/src/i18n/messages/es_419.json
+++ b/src/i18n/messages/es_419.json
@@ -114,6 +114,7 @@
   "registration.username.label": "Nombre de usuario público",
   "registration.password.label": "Contraseña",
   "registration.country.label": "País/Región",
+  "registration.opt.in.label": "Recibir correos de marketing",
   "help.text.name": "Este nombre será utilizado por los certificados que obtengas.",
   "help.text.username.1": "El nombre que te identificará en tus cursos.",
   "help.text.username.2": "Esto no puede modificarse posteriormente.",
@@ -130,7 +131,7 @@
   "email.ratelimit.less.chars.validation.message": "El correo electrónico debe tener 3 caracteres.",
   "username.validation.message": "El nombre de usuario debe tener entre 2 y 30 caracteres",
   "name.validation.message": "Introduce un nombre válido",
-  "username.format.validation.message": "Usernames can only contain letters (A-Z, a-z), numerals (0-9), underscores (_), and hyphens (-). Usernames cannot contain spaces.",
+  "username.format.validation.message": "Los nombres de usuario solo pueden contener letras  (A-Z, a-z), números (0-9), guiones bajos (_) y guiones (-). Los nombres de usuario no pueden contener espacios.",
   "support.education.research": "Apoya la investigación sobre educación proporcionando información adicional. (Opcional)",
   "registration.request.failure.header": "No pudimos crear tu cuenta.",
   "registration.empty.form.submission.error": "Por favor, verifica tus respuestas y vuelve a intentarlo.",
diff --git a/src/i18n/messages/fr.json b/src/i18n/messages/fr.json
index 1dababa3..a83ba1ac 100644
--- a/src/i18n/messages/fr.json
+++ b/src/i18n/messages/fr.json
@@ -114,6 +114,7 @@
   "registration.username.label": "Nom d'utilisateur public",
   "registration.password.label": "Mot de passe",
   "registration.country.label": "Pays/Région",
+  "registration.opt.in.label": "Receive marketing emails",
   "help.text.name": "Ce nom sera utilisé pour toutes les attestations que vous obtiendrez.",
   "help.text.username.1": "Le nom qui vous identifiera dans vos cours.",
   "help.text.username.2": "Cela ne peut pas être modifié ultérieurement.",
diff --git a/src/i18n/messages/zh_CN.json b/src/i18n/messages/zh_CN.json
index 20ebdb8b..2f25527b 100644
--- a/src/i18n/messages/zh_CN.json
+++ b/src/i18n/messages/zh_CN.json
@@ -114,6 +114,7 @@
   "registration.username.label": "Public username",
   "registration.password.label": "Password",
   "registration.country.label": "Country/Region",
+  "registration.opt.in.label": "Receive marketing emails",
   "help.text.name": "This name will be used by any certificates that you earn.",
   "help.text.username.1": "The name that will identify you in your courses.",
   "help.text.username.2": "This can not be changed later.",