diff --git a/scripts/langindex.json b/scripts/langindex.json
index 4c0f0bc57..d86efa26d 100644
--- a/scripts/langindex.json
+++ b/scripts/langindex.json
@@ -344,6 +344,7 @@
   "addon.mod_assign_submission_comments.pluginname": "assignsubmission_comments",
   "addon.mod_assign_submission_file.pluginname": "assignsubmission_file",
   "addon.mod_assign_submission_onlinetext.pluginname": "assignsubmission_onlinetext",
+  "addon.mod_assign_submission_onlinetext.wordlimitexceeded": "assignsubmission_onlinetext",
   "addon.mod_book.errorchapter": "book",
   "addon.mod_book.modulenameplural": "book",
   "addon.mod_book.toc": "book",
diff --git a/src/addon/mod/assign/providers/assign.ts b/src/addon/mod/assign/providers/assign.ts
index 72320b5f7..93e8204f0 100644
--- a/src/addon/mod/assign/providers/assign.ts
+++ b/src/addon/mod/assign/providers/assign.ts
@@ -379,9 +379,13 @@ export class AddonModAssignProvider {
      *
      * @param {any} assign Assign.
      * @param {any} attempt Attempt.
-     * @return {any} Submission object.
+     * @return {any} Submission object or null.
      */
     getSubmissionObjectFromAttempt(assign: any, attempt: any): any {
+        if (!attempt) {
+            return null;
+        }
+
         return assign.teamsubmission ? attempt.teamsubmission : attempt.submission;
     }
 
diff --git a/src/addon/mod/assign/submission/onlinetext/lang/en.json b/src/addon/mod/assign/submission/onlinetext/lang/en.json
index 9b8a3d9f9..e49362133 100644
--- a/src/addon/mod/assign/submission/onlinetext/lang/en.json
+++ b/src/addon/mod/assign/submission/onlinetext/lang/en.json
@@ -1,3 +1,4 @@
 {
-    "pluginname": "Online text submissions"
+    "pluginname": "Online text submissions",
+    "wordlimitexceeded": "The word limit for this assignment is {{$a.limit}} words and you are attempting to submit {{$a.count}} words. Please review your submission and try again."
 }
\ No newline at end of file
diff --git a/src/addon/mod/assign/submission/onlinetext/providers/handler.ts b/src/addon/mod/assign/submission/onlinetext/providers/handler.ts
index 718a13f51..80745907b 100644
--- a/src/addon/mod/assign/submission/onlinetext/providers/handler.ts
+++ b/src/addon/mod/assign/submission/onlinetext/providers/handler.ts
@@ -14,6 +14,7 @@
 // limitations under the License.
 
 import { Injectable, Injector } from '@angular/core';
+import { TranslateService } from '@ngx-translate/core';
 import { CoreSitesProvider } from '@providers/sites';
 import { CoreWSProvider } from '@providers/ws';
 import { CoreTextUtilsProvider } from '@providers/utils/text';
@@ -31,7 +32,7 @@ export class AddonModAssignSubmissionOnlineTextHandler implements AddonModAssign
     name = 'AddonModAssignSubmissionOnlineTextHandler';
     type = 'onlinetext';
 
-    constructor(private sitesProvider: CoreSitesProvider, private wsProvider: CoreWSProvider,
+    constructor(private translate: TranslateService, private sitesProvider: CoreSitesProvider, private wsProvider: CoreWSProvider,
         private textUtils: CoreTextUtilsProvider, private assignProvider: AddonModAssignProvider,
         private assignOfflineProvider: AddonModAssignOfflineProvider, private assignHelper: AddonModAssignHelperProvider) { }
 
@@ -238,6 +239,19 @@ export class AddonModAssignSubmissionOnlineTextHandler implements AddonModAssign
 
         let text = this.getTextToSubmit(plugin, inputData);
 
+        // Check word limit.
+        const configs = this.assignHelper.getPluginConfig(assign, 'assignsubmission', plugin.type);
+        if (parseInt(configs.wordlimitenabled, 10)) {
+            const words = this.textUtils.countWords(text);
+            const wordlimit = parseInt(configs.wordlimit, 10);
+            if (words > wordlimit) {
+                const params = {$a: {count: words, limit: wordlimit}};
+                const message = this.translate.instant('addon.mod_assign_submission_onlinetext.wordlimitexceeded', params);
+
+                return Promise.reject(message);
+            }
+        }
+
         // Add some HTML to the text if needed.
         text = this.textUtils.formatHtmlLines(text);
 
diff --git a/src/assets/lang/en.json b/src/assets/lang/en.json
index e0c8c523a..8fd9e1499 100644
--- a/src/assets/lang/en.json
+++ b/src/assets/lang/en.json
@@ -344,6 +344,7 @@
     "addon.mod_assign_submission_comments.pluginname": "Submission comments",
     "addon.mod_assign_submission_file.pluginname": "File submissions",
     "addon.mod_assign_submission_onlinetext.pluginname": "Online text submissions",
+    "addon.mod_assign_submission_onlinetext.wordlimitexceeded": "The word limit for this assignment is {{$a.limit}} words and you are attempting to submit {{$a.count}} words. Please review your submission and try again.",
     "addon.mod_book.errorchapter": "Error reading chapter of book.",
     "addon.mod_book.modulenameplural": "Books",
     "addon.mod_book.toc": "Table of contents",