diff --git a/lib/accounts/user.ex b/lib/accounts/user.ex
index c65b882..d50642f 100644
--- a/lib/accounts/user.ex
+++ b/lib/accounts/user.ex
@@ -162,8 +162,10 @@ defmodule Mv.Accounts.User do
   # Global validations - applied to all relevant actions
   validations do
     # Password strength policy: minimum 8 characters for all password-related actions
-    validate string_length(:password, min: 8) do
-      where action_is([:register_with_password, :admin_set_password])
+    validate string_length(:password, min: 8),
+      where: [action_is([:register_with_password, :admin_set_password])],
+      message: "must have length of at least 8"
+
     end
 
     # Prevent overwriting existing member relationship
diff --git a/priv/gettext/de/LC_MESSAGES/default.po b/priv/gettext/de/LC_MESSAGES/default.po
index 0d7f129..24b3645 100644
--- a/priv/gettext/de/LC_MESSAGES/default.po
+++ b/priv/gettext/de/LC_MESSAGES/default.po
@@ -21,8 +21,8 @@ msgstr "Aktionen"
 msgid "Are you sure?"
 msgstr "Bist du sicher?"
 
-#: lib/mv_web/components/layouts.ex:71
-#: lib/mv_web/components/layouts.ex:83
+#: lib/mv_web/components/layouts.ex:80
+#: lib/mv_web/components/layouts.ex:92
 #, elixir-autogen, elixir-format
 msgid "Attempting to reconnect"
 msgstr "Verbindung wird wiederhergestellt"
@@ -93,12 +93,12 @@ msgstr "Neues Mitglied"
 msgid "Show"
 msgstr "Anzeigen"
 
-#: lib/mv_web/components/layouts.ex:78
+#: lib/mv_web/components/layouts.ex:87
 #, elixir-autogen, elixir-format
 msgid "Something went wrong!"
 msgstr "Etwas ist schiefgelaufen!"
 
-#: lib/mv_web/components/layouts.ex:66
+#: lib/mv_web/components/layouts.ex:75
 #, elixir-autogen, elixir-format
 msgid "We can't find the internet"
 msgstr "Keine Internetverbindung gefunden"
@@ -301,7 +301,7 @@ msgstr "ID"
 msgid "Immutable"
 msgstr "Unveränderlich"
 
-#: lib/mv_web/components/layouts/navbar.ex:88
+#: lib/mv_web/components/layouts/navbar.ex:94
 #, elixir-autogen, elixir-format
 msgid "Logout"
 msgstr "Abmelden"
@@ -317,7 +317,7 @@ msgstr "Benutzer auflisten"
 msgid "Member"
 msgstr "Mitglied"
 
-#: lib/mv_web/components/layouts/navbar.ex:14
+#: lib/mv_web/components/layouts/navbar.ex:19
 #: lib/mv_web/live/member_live/index.ex:14
 #: lib/mv_web/live/member_live/index.html.heex:3
 #, elixir-autogen, elixir-format
@@ -367,7 +367,7 @@ msgstr "Passwort-Authentifizierung"
 msgid "Please select a property type first"
 msgstr "Bitte wählen Sie zuerst einen Eigenschaftstyp"
 
-#: lib/mv_web/components/layouts/navbar.ex:84
+#: lib/mv_web/components/layouts/navbar.ex:89
 #, elixir-autogen, elixir-format
 msgid "Profil"
 msgstr "Profil"
@@ -412,7 +412,7 @@ msgstr "Alle Mitglieder auswählen"
 msgid "Select member"
 msgstr "Mitglied auswählen"
 
-#: lib/mv_web/components/layouts/navbar.ex:87
+#: lib/mv_web/components/layouts/navbar.ex:92
 #, elixir-autogen, elixir-format
 msgid "Settings"
 msgstr "Einstellungen"
@@ -585,14 +585,14 @@ msgstr "Zurück zur Mitgliederliste"
 msgid "Back to users list"
 msgstr "Zurück zur Benutzerliste"
 
-#: lib/mv_web/components/layouts/navbar.ex:22
-#: lib/mv_web/components/layouts/navbar.ex:28
+#: lib/mv_web/components/layouts/navbar.ex:27
+#: lib/mv_web/components/layouts/navbar.ex:33
 #, elixir-autogen, elixir-format
 msgid "Select language"
 msgstr "Sprache auswählen"
 
-#: lib/mv_web/components/layouts/navbar.ex:35
-#: lib/mv_web/components/layouts/navbar.ex:55
+#: lib/mv_web/components/layouts/navbar.ex:40
+#: lib/mv_web/components/layouts/navbar.ex:60
 #, elixir-autogen, elixir-format
 msgid "Toggle dark mode"
 msgstr "Dunklen Modus umschalten"
@@ -603,7 +603,7 @@ msgstr "Dunklen Modus umschalten"
 msgid "Search..."
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:15
+#: lib/mv_web/components/layouts/navbar.ex:20
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Users"
 msgstr "Benutzer"
diff --git a/priv/gettext/de/LC_MESSAGES/errors.po b/priv/gettext/de/LC_MESSAGES/errors.po
index b9332ab..e7eb139 100644
--- a/priv/gettext/de/LC_MESSAGES/errors.po
+++ b/priv/gettext/de/LC_MESSAGES/errors.po
@@ -110,3 +110,49 @@ msgstr "muss größer oder gleich %{number} sein"
 
 msgid "must be equal to %{number}"
 msgstr "muss gleich %{number} sein"
+
+## Ash Framework - Standard constraint messages
+msgid "length must be greater than or equal to %{min}"
+msgstr "muss mindestens %{min} Zeichen lang sein"
+
+msgid "length must be less than or equal to %{max}"
+msgstr "darf höchstens %{max} Zeichen lang sein"
+
+msgid "must be present"
+msgstr "muss vorhanden sein"
+
+## Custom validation messages from Mv.Accounts.User
+msgid "User already has a member. Remove existing member first."
+msgstr "Benutzer hat bereits ein Mitglied. Entfernen Sie zuerst das vorhandene Mitglied."
+
+msgid "OIDC user_info must contain a non-empty 'sub' or 'id' field"
+msgstr "OIDC user_info darf kein leeres 'sub' oder 'id' Feld enthalten"
+
+
+## Custom validation messages from Mv.Membership.Member
+msgid "User is already linked to another member"
+msgstr "Benutzer ist bereits mit einem anderen Mitglied verknüpft"
+
+msgid "User not found"
+msgstr "Benutzer nicht gefunden"
+
+msgid "cannot be in the future"
+msgstr "darf nicht in der Zukunft liegen"
+
+msgid "cannot be before join date"
+msgstr "darf nicht vor dem Beitrittsdatum liegen"
+
+msgid "is not a valid phone number"
+msgstr "ist keine gültige Telefonnummer"
+
+msgid "must consist of 5 digits"
+msgstr "muss aus 5 Ziffern bestehen"
+
+msgid "is not a valid email"
+msgstr "ist keine gültige E-Mail-Adresse"
+
+msgid "must have length of at least 8"
+msgstr "muss mindestens 8 Zeichen lang sein"
+
+msgid "is required"
+msgstr "ist erforderlich"
diff --git a/priv/gettext/default.pot b/priv/gettext/default.pot
index e9da120..93c5d95 100644
--- a/priv/gettext/default.pot
+++ b/priv/gettext/default.pot
@@ -22,8 +22,8 @@ msgstr ""
 msgid "Are you sure?"
 msgstr ""
 
-#: lib/mv_web/components/layouts.ex:71
-#: lib/mv_web/components/layouts.ex:83
+#: lib/mv_web/components/layouts.ex:80
+#: lib/mv_web/components/layouts.ex:92
 #, elixir-autogen, elixir-format
 msgid "Attempting to reconnect"
 msgstr ""
@@ -94,12 +94,12 @@ msgstr ""
 msgid "Show"
 msgstr ""
 
-#: lib/mv_web/components/layouts.ex:78
+#: lib/mv_web/components/layouts.ex:87
 #, elixir-autogen, elixir-format
 msgid "Something went wrong!"
 msgstr ""
 
-#: lib/mv_web/components/layouts.ex:66
+#: lib/mv_web/components/layouts.ex:75
 #, elixir-autogen, elixir-format
 msgid "We can't find the internet"
 msgstr ""
@@ -302,7 +302,7 @@ msgstr ""
 msgid "Immutable"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:88
+#: lib/mv_web/components/layouts/navbar.ex:94
 #, elixir-autogen, elixir-format
 msgid "Logout"
 msgstr ""
@@ -318,7 +318,7 @@ msgstr ""
 msgid "Member"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:14
+#: lib/mv_web/components/layouts/navbar.ex:19
 #: lib/mv_web/live/member_live/index.ex:14
 #: lib/mv_web/live/member_live/index.html.heex:3
 #, elixir-autogen, elixir-format
@@ -368,7 +368,7 @@ msgstr ""
 msgid "Please select a property type first"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:84
+#: lib/mv_web/components/layouts/navbar.ex:89
 #, elixir-autogen, elixir-format
 msgid "Profil"
 msgstr ""
@@ -413,7 +413,7 @@ msgstr ""
 msgid "Select member"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:87
+#: lib/mv_web/components/layouts/navbar.ex:92
 #, elixir-autogen, elixir-format
 msgid "Settings"
 msgstr ""
@@ -586,14 +586,14 @@ msgstr ""
 msgid "Back to users list"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:22
-#: lib/mv_web/components/layouts/navbar.ex:28
+#: lib/mv_web/components/layouts/navbar.ex:27
+#: lib/mv_web/components/layouts/navbar.ex:33
 #, elixir-autogen, elixir-format
 msgid "Select language"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:35
-#: lib/mv_web/components/layouts/navbar.ex:55
+#: lib/mv_web/components/layouts/navbar.ex:40
+#: lib/mv_web/components/layouts/navbar.ex:60
 #, elixir-autogen, elixir-format
 msgid "Toggle dark mode"
 msgstr ""
@@ -604,7 +604,7 @@ msgstr ""
 msgid "Search..."
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:15
+#: lib/mv_web/components/layouts/navbar.ex:20
 #, elixir-autogen, elixir-format
 msgid "Users"
 msgstr ""
diff --git a/priv/gettext/en/LC_MESSAGES/default.po b/priv/gettext/en/LC_MESSAGES/default.po
index 4119061..ac30f5d 100644
--- a/priv/gettext/en/LC_MESSAGES/default.po
+++ b/priv/gettext/en/LC_MESSAGES/default.po
@@ -22,8 +22,8 @@ msgstr ""
 msgid "Are you sure?"
 msgstr ""
 
-#: lib/mv_web/components/layouts.ex:71
-#: lib/mv_web/components/layouts.ex:83
+#: lib/mv_web/components/layouts.ex:80
+#: lib/mv_web/components/layouts.ex:92
 #, elixir-autogen, elixir-format
 msgid "Attempting to reconnect"
 msgstr ""
@@ -94,12 +94,12 @@ msgstr ""
 msgid "Show"
 msgstr ""
 
-#: lib/mv_web/components/layouts.ex:78
+#: lib/mv_web/components/layouts.ex:87
 #, elixir-autogen, elixir-format
 msgid "Something went wrong!"
 msgstr ""
 
-#: lib/mv_web/components/layouts.ex:66
+#: lib/mv_web/components/layouts.ex:75
 #, elixir-autogen, elixir-format
 msgid "We can't find the internet"
 msgstr ""
@@ -302,7 +302,7 @@ msgstr ""
 msgid "Immutable"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:88
+#: lib/mv_web/components/layouts/navbar.ex:94
 #, elixir-autogen, elixir-format
 msgid "Logout"
 msgstr ""
@@ -318,7 +318,7 @@ msgstr ""
 msgid "Member"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:14
+#: lib/mv_web/components/layouts/navbar.ex:19
 #: lib/mv_web/live/member_live/index.ex:14
 #: lib/mv_web/live/member_live/index.html.heex:3
 #, elixir-autogen, elixir-format
@@ -368,7 +368,7 @@ msgstr ""
 msgid "Please select a property type first"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:84
+#: lib/mv_web/components/layouts/navbar.ex:89
 #, elixir-autogen, elixir-format
 msgid "Profil"
 msgstr ""
@@ -413,7 +413,7 @@ msgstr ""
 msgid "Select member"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:87
+#: lib/mv_web/components/layouts/navbar.ex:92
 #, elixir-autogen, elixir-format
 msgid "Settings"
 msgstr ""
@@ -586,14 +586,14 @@ msgstr ""
 msgid "Back to users list"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:22
-#: lib/mv_web/components/layouts/navbar.ex:28
+#: lib/mv_web/components/layouts/navbar.ex:27
+#: lib/mv_web/components/layouts/navbar.ex:33
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Select language"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:35
-#: lib/mv_web/components/layouts/navbar.ex:55
+#: lib/mv_web/components/layouts/navbar.ex:40
+#: lib/mv_web/components/layouts/navbar.ex:60
 #, elixir-autogen, elixir-format
 msgid "Toggle dark mode"
 msgstr ""
@@ -604,7 +604,7 @@ msgstr ""
 msgid "Search..."
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:15
+#: lib/mv_web/components/layouts/navbar.ex:20
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Users"
 msgstr ""
diff --git a/priv/gettext/en/LC_MESSAGES/errors.po b/priv/gettext/en/LC_MESSAGES/errors.po
index 844c4f5..37e99e2 100644
--- a/priv/gettext/en/LC_MESSAGES/errors.po
+++ b/priv/gettext/en/LC_MESSAGES/errors.po
@@ -110,3 +110,49 @@ msgstr ""
 
 msgid "must be equal to %{number}"
 msgstr ""
+
+## Ash Framework - Standard constraint messages
+msgid "length must be greater than or equal to %{min}"
+msgstr ""
+
+msgid "length must be less than or equal to %{max}"
+msgstr ""
+
+msgid "must be present"
+msgstr ""
+
+## Custom validation messages from Mv.Accounts.User
+msgid "User already has a member. Remove existing member first."
+msgstr ""
+
+msgid "OIDC user_info must contain a non-empty 'sub' or 'id' field"
+msgstr ""
+
+
+## Custom validation messages from Mv.Membership.Member
+msgid "User is already linked to another member"
+msgstr ""
+
+msgid "User not found"
+msgstr ""
+
+msgid "cannot be in the future"
+msgstr ""
+
+msgid "cannot be before join date"
+msgstr ""
+
+msgid "is not a valid phone number"
+msgstr ""
+
+msgid "must consist of 5 digits"
+msgstr ""
+
+msgid "is not a valid email"
+msgstr ""
+
+msgid "must have length of at least 8"
+msgstr ""
+
+msgid "is required"
+msgstr ""
diff --git a/priv/gettext/errors.pot b/priv/gettext/errors.pot
index eef2de2..d60c8df 100644
--- a/priv/gettext/errors.pot
+++ b/priv/gettext/errors.pot
@@ -107,3 +107,49 @@ msgstr ""
 
 msgid "must be equal to %{number}"
 msgstr ""
+
+## Ash Framework - Standard constraint messages
+msgid "length must be greater than or equal to %{min}"
+msgstr ""
+
+msgid "length must be less than or equal to %{max}"
+msgstr ""
+
+msgid "must be present"
+msgstr ""
+
+## Custom validation messages from Mv.Accounts.User
+msgid "User already has a member. Remove existing member first."
+msgstr ""
+
+msgid "OIDC user_info must contain a non-empty 'sub' or 'id' field"
+msgstr ""
+
+
+## Custom validation messages from Mv.Membership.Member
+msgid "User is already linked to another member"
+msgstr ""
+
+msgid "User not found"
+msgstr ""
+
+msgid "cannot be in the future"
+msgstr ""
+
+msgid "cannot be before join date"
+msgstr ""
+
+msgid "is not a valid phone number"
+msgstr ""
+
+msgid "must consist of 5 digits"
+msgstr ""
+
+msgid "is not a valid email"
+msgstr ""
+
+msgid "must have length of at least 8"
+msgstr ""
+
+msgid "is required"
+msgstr ""