diff --git a/client/src/views/modal.js b/client/src/views/modal.js
index 2e540e67ea..f6a08fa6d3 100644
--- a/client/src/views/modal.js
+++ b/client/src/views/modal.js
@@ -72,7 +72,7 @@ class ModalView extends View {
      * @property {'static'|boolean} [backdrop] A backdrop.
      * @property {module:views/modal~Button} [buttonList] Buttons.
      * @property {module:views/modal~Button} [dropdownItemList] Buttons.
-     * @property {boolean} [collapseDisabled] Not collapsable. As of v9.1.0.
+     * @property {boolean} [collapseDisabled] Not collapsible. As of v9.1.0.
      */
 
     /**
@@ -234,7 +234,7 @@ class ModalView extends View {
      * @protected
      * @type {boolean}
      */
-    isCollapsable = false
+    isCollapsible = false
 
     /**
      * Is maximizable.
@@ -326,7 +326,7 @@ class ModalView extends View {
         }
 
         if (this.options.collapseDisabled) {
-            this.isCollapsable = false;
+            this.isCollapsible = false;
         }
 
         this.on('render', () => {
@@ -387,7 +387,7 @@ class ModalView extends View {
                 screenWidthXs: this.getThemeManager().getParam('screenWidthXs'),
                 fixedHeaderHeight: this.fixedHeaderHeight,
                 closeButton: !this.noCloseButton,
-                collapseButton: this.isCollapsable,
+                collapseButton: this.isCollapsible,
                 maximizeButton: this.isMaximizable && !this.getHelper().isXsScreen(),
                 onRemove: () => this.onDialogClose(),
                 onBackdropClick: () => this.onBackdropClick(),
@@ -436,7 +436,7 @@ class ModalView extends View {
             $(this.containerSelector).remove();
         });
 
-        if (this.isCollapsable) {
+        if (this.isCollapsible) {
             this.addActionHandler('collapseModal', () => this.collapse());
         }
 
diff --git a/client/src/views/modals/compose-email.js b/client/src/views/modals/compose-email.js
index e6450285fe..cb515f87ea 100644
--- a/client/src/views/modals/compose-email.js
+++ b/client/src/views/modals/compose-email.js
@@ -36,7 +36,7 @@ class ComposeEmailModalView extends EditModalView {
     layoutName = 'composeSmall'
     saveDisabled = true
     fullFormDisabled = true
-    isCollapsable = true
+    isCollapsible = true
     wasModified = false
 
     shortcutKeys = {
diff --git a/client/src/views/modals/detail.js b/client/src/views/modals/detail.js
index ec9e32ef4e..563c9f4fc9 100644
--- a/client/src/views/modals/detail.js
+++ b/client/src/views/modals/detail.js
@@ -663,7 +663,7 @@ class DetailModalView extends ModalView {
             },
         });
 
-        // Not to hidden as it interferes with the collapsable modal.
+        // Not to be hidden as it interferes with the collapsible modal.
         //this.dialog.hide();
 
         return modalView;
diff --git a/client/src/views/modals/edit.js b/client/src/views/modals/edit.js
index 51613edace..31e66cbe43 100644
--- a/client/src/views/modals/edit.js
+++ b/client/src/views/modals/edit.js
@@ -52,7 +52,7 @@ class EditModalView extends ModalView {
     /** @protected */
     bottomDisabled = false
 
-    isCollapsable = true
+    isCollapsible = true
 
     /**
      * @private
diff --git a/client/src/views/site/navbar.js b/client/src/views/site/navbar.js
index 5b626712a2..fc8e836b44 100644
--- a/client/src/views/site/navbar.js
+++ b/client/src/views/site/navbar.js
@@ -264,7 +264,7 @@ class NavbarSiteView extends View {
     /**
      * @private
      */
-    isCollapsableVisible() {
+    isCollapsibleVisible() {
         return this.$el.find('.navbar-body').hasClass('in');
     }
 
@@ -272,7 +272,7 @@ class NavbarSiteView extends View {
      * @private
      */
     toggleCollapsable() {
-        if (this.isCollapsableVisible()) {
+        if (this.isCollapsibleVisible()) {
             this.hideCollapsable();
         } else {
             this.showCollapsable();