diff --git a/scripts/langindex.json b/scripts/langindex.json
index 0cbf1d82e..daac220eb 100644
--- a/scripts/langindex.json
+++ b/scripts/langindex.json
@@ -410,6 +410,7 @@
   "addon.mod_assign.timemodified": "assign",
   "addon.mod_assign.timeremaining": "assign",
   "addon.mod_assign.ungroupedusers": "assign",
+  "addon.mod_assign.ungroupedusersoptional": "assign",
   "addon.mod_assign.unlimitedattempts": "assign",
   "addon.mod_assign.userswhoneedtosubmit": "assign",
   "addon.mod_assign.userwithid": "local_moodlemobileapp",
@@ -1571,7 +1572,6 @@
   "core.login.auth_email": "auth_email/pluginname",
   "core.login.authenticating": "local_moodlemobileapp",
   "core.login.cancel": "moodle",
-  "core.login.changepassowrdinstructions": "local_moodlemobileapp",
   "core.login.changepassword": "moodle",
   "core.login.changepasswordbutton": "local_moodlemobileapp",
   "core.login.changepasswordhelp": "local_moodlemobileapp",
diff --git a/src/addon/mod/assign/components/index/addon-mod-assign-index.html b/src/addon/mod/assign/components/index/addon-mod-assign-index.html
index 3e118e578..4ccbf69c2 100644
--- a/src/addon/mod/assign/components/index/addon-mod-assign-index.html
+++ b/src/addon/mod/assign/components/index/addon-mod-assign-index.html
@@ -86,7 +86,7 @@
         <!-- Ungrouped users. -->
         <div *ngIf="assign.teamsubmission && summary && summary.warnofungroupedusers" class="core-info-card" icon-start>
             <ion-icon name="information-circle"></ion-icon>
-            {{ 'addon.mod_assign.ungroupedusers' | translate }}
+            {{ 'addon.mod_assign.'+summary.warnofungroupedusers | translate }}
         </div>
     </ion-list>
 
diff --git a/src/addon/mod/assign/components/index/index.ts b/src/addon/mod/assign/components/index/index.ts
index 1d37fe6ac..b392abef3 100644
--- a/src/addon/mod/assign/components/index/index.ts
+++ b/src/addon/mod/assign/components/index/index.ts
@@ -235,6 +235,21 @@ export class AddonModAssignIndexComponent extends CoreCourseModuleMainActivityCo
 
         return this.assignProvider.getSubmissionStatus(this.assign.id, undefined, this.group).then((response) => {
             this.summary = response.gradingsummary;
+            if (typeof this.summary.warnofungroupedusers == 'boolean' && this.summary.warnofungroupedusers) {
+                this.summary.warnofungroupedusers = 'ungroupedusers';
+            } else {
+                switch (this.summary.warnofungroupedusers) {
+                    case AddonModAssignProvider.WARN_GROUPS_REQUIRED:
+                        this.summary.warnofungroupedusers = 'ungroupedusers';
+                        break;
+                    case AddonModAssignProvider.WARN_GROUPS_OPTIONAL:
+                        this.summary.warnofungroupedusers = 'ungroupedusersoptional';
+                        break;
+                    default:
+                        this.summary.warnofungroupedusers = '';
+                        break;
+                }
+            }
 
             this.needsGradingAvalaible = response.gradingsummary && response.gradingsummary.submissionsneedgradingcount > 0 &&
                     this.sitesProvider.getCurrentSite().isVersionGreaterEqualThan('3.2');
diff --git a/src/addon/mod/assign/lang/en.json b/src/addon/mod/assign/lang/en.json
index 9436ddd36..fb0908c5d 100644
--- a/src/addon/mod/assign/lang/en.json
+++ b/src/addon/mod/assign/lang/en.json
@@ -93,6 +93,7 @@
     "timemodified": "Last modified",
     "timeremaining": "Time remaining",
     "ungroupedusers": "The setting 'Require group to make submission' is enabled and some users are either not a member of any group, or are a member of more than one group, so are unable to make submissions.",
+    "ungroupedusersoptional": "The setting 'Students submit in groups' is enabled and some users are either not a member of any group, or are a member of more than one group. Please be aware that these students will submit as members of the 'Default group'.",
     "unlimitedattempts": "Unlimited",
     "userwithid": "User with ID {{id}}",
     "userswhoneedtosubmit": "Users who need to submit: {{$a}}",
diff --git a/src/addon/mod/assign/providers/assign.ts b/src/addon/mod/assign/providers/assign.ts
index 44465a59f..34c02701d 100644
--- a/src/addon/mod/assign/providers/assign.ts
+++ b/src/addon/mod/assign/providers/assign.ts
@@ -55,6 +55,10 @@ export class AddonModAssignProvider {
     static NEED_GRADING = 'needgrading';
     static GRADED_FOLLOWUP_SUBMIT = 'gradedfollowupsubmit';
 
+    // Group submissions warnings.
+    static WARN_GROUPS_REQUIRED = 'warnrequired';
+    static WARN_GROUPS_OPTIONAL = 'warnoptional';
+
     // Events.
     static SUBMISSION_SAVED_EVENT = 'addon_mod_assign_submission_saved';
     static SUBMITTED_FOR_GRADING_EVENT = 'addon_mod_assign_submitted_for_grading';
@@ -1396,7 +1400,7 @@ export type AddonModAssignSubmissionGradingSummary = {
     submissionsenabled: boolean; // Whether submissions are enabled or not.
     submissionssubmittedcount: number; // Number of submissions in submitted status.
     submissionsneedgradingcount: number; // Number of submissions that need grading.
-    warnofungroupedusers: string; // Whether we need to warn people about groups.
+    warnofungroupedusers: string | boolean; // Whether we need to warn people about groups.
 };
 
 /**
diff --git a/src/assets/lang/en.json b/src/assets/lang/en.json
index 885e7adab..b7de06e75 100644
--- a/src/assets/lang/en.json
+++ b/src/assets/lang/en.json
@@ -409,6 +409,7 @@
     "addon.mod_assign.timemodified": "Last modified",
     "addon.mod_assign.timeremaining": "Time remaining",
     "addon.mod_assign.ungroupedusers": "The setting 'Require group to make submission' is enabled and some users are either not a member of any group, or are a member of more than one group, so are unable to make submissions.",
+    "addon.mod_assign.ungroupedusersoptional": "The setting 'Students submit in groups' is enabled and some users are either not a member of any group, or are a member of more than one group. Please be aware that these students will submit as members of the 'Default group'.",
     "addon.mod_assign.unlimitedattempts": "Unlimited",
     "addon.mod_assign.userswhoneedtosubmit": "Users who need to submit: {{$a}}",
     "addon.mod_assign.userwithid": "User with ID {{id}}",