diff --git a/docs/diagrams/domain_model_frag_jetzt.png b/docs/diagrams/domain_model_frag_jetzt.png
index 763a065aa958792e19fb7f7332e578fca837ecb9..514c656520d4854c8a27f4fa34047f5260ca2d71 100644
Binary files a/docs/diagrams/domain_model_frag_jetzt.png and b/docs/diagrams/domain_model_frag_jetzt.png differ
diff --git a/docs/diagrams/domain_model_frag_jetzt.puml b/docs/diagrams/domain_model_frag_jetzt.puml
index e8dde40dff9612e9bb2dba2a7ad0bd4abd224b50..55c1f31565f42ed31c86816240965fffa9d14d61 100644
--- a/docs/diagrams/domain_model_frag_jetzt.puml
+++ b/docs/diagrams/domain_model_frag_jetzt.puml
@@ -28,9 +28,6 @@ hide circle
 
 package "frag.jetzt | domain diagram" <<Frame>> {
 
-class Role {
-}
-
 class GuestUser {
 }
 
@@ -39,17 +36,17 @@ class RegisteredUser {
   password
 }
 
-GuestUser -left-|> Role
-RegisteredUser -up-|> Role
+GuestUser -left-|> User
+RegisteredUser -up-|> User
 
 class SessionParticipant {
 }
 
-class TemporalSessionOwner {
+class TemporalSessionHolder {
 }
 
 SessionParticipant -left-|> GuestUser
-TemporalSessionOwner -up-|> GuestUser
+TemporalSessionHolder -up-|> GuestUser
 
 class Moderator <<USP>> {
 }
@@ -57,10 +54,10 @@ class Moderator <<USP>> {
 class BonusParticipant <<USP>> {
 }
 
-class PermanentSessionOwner {
+class PermanentSessionHolder{
 }
 
-PermanentSessionOwner -left-|> RegisteredUser
+PermanentSessionHolder -left-|> RegisteredUser
 Moderator -up-|> RegisteredUser
 Moderator -down- Session :assigned to >
 BonusParticipant -right-|> RegisteredUser
@@ -69,7 +66,8 @@ class Session {
   id
   name
   description
-  owner
+  holder
+  moderators
   }
 
 class Question {
@@ -86,7 +84,7 @@ class Status {
 Status -up- Question
 
 class Board {
-  help
+  helpPage
 }
 
 class QuestionBoard {
diff --git a/src/assets/i18n/home/de.json b/src/assets/i18n/home/de.json
index b00c2f6d3f218a32042bc5196d7049079bff4f13..c9850764a0bb8086d36da2e50d03969aa941aa46 100644
--- a/src/assets/i18n/home/de.json
+++ b/src/assets/i18n/home/de.json
@@ -89,7 +89,7 @@
 		"create-session": "Session erstellen"
   },
   "footer": {
-    "demo": "Demo Video",
+    "demo": "Demo",
     "dsgvo": "Datenschutz",
     "imprint": "Impressum",
     "will-open": " wird in einem neuen Fenster geöffnet...",
@@ -98,7 +98,7 @@
     "dark": "Dunkler Hintergrund",
     "bright": "Heller Hintergrund",
     "beamer": "Für den Beamer optimiert (in Arbeit)",
-    "wai": "Barrierefrei nach WCAG 2.0 (in Arbeit)",
+    "wai": "Barrierefrei nach WCAG 2.1 (in Arbeit)",
     "style": "Stil",
     "language": "Sprache",
     "english": "Englisch",
diff --git a/src/assets/i18n/home/en.json b/src/assets/i18n/home/en.json
index c9eba7feaf389abb19a648577f765a30ea8fa0c3..16f795e9fe6385afa7d8604a7173eee2c89876d1 100644
--- a/src/assets/i18n/home/en.json
+++ b/src/assets/i18n/home/en.json
@@ -89,7 +89,7 @@
 		"create-session": "Create session"
 	},
   "footer": {
-    "demo": "Demo video",
+    "demo": "Demo",
     "dsgvo": "Data Protection",
     "imprint": "Imprint",
     "will-open": " will be opened in a new tab...",
@@ -98,7 +98,7 @@
     "dark": "Dark background",
     "bright": "Bright background",
     "beamer": "Optimized for the projector (work in progress)",
-    "wai": "Accessible according to WCAG 2.0 (work in progress)",
+    "wai": "Accessible according to WCAG 2.1 (work in progress)",
     "style": "Style",
     "language": "Language",
     "english": "English",