diff --git a/src/i18n/en.json b/src/i18n/en.json
index 70f0bacf..49c45014 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -279,7 +279,7 @@
             "text/plain": "Plain text",
             "text/x.misskeymarkdown": "MFM"
         },
-        "content_warning": "Subject (optional)",
+        "content_warning": "Content Warning (optional)",
         "default": "Just arrived at Luna Nova Academy",
         "direct_warning_to_all": "This post will be visible to all the mentioned users.",
         "direct_warning_to_first_only": "This post will only be visible to the mentioned users at the beginning of the message.",
@@ -392,7 +392,7 @@
         "changed_password": "Password changed successfully!",
         "chatMessageRadius": "Chat message",
         "checkboxRadius": "Checkboxes",
-        "collapse_subject": "Collapse posts with subjects",
+        "collapse_subject": "Collapse posts with content warnings",
         "columns": "Columns",
         "composing": "Composing",
         "confirm_dialogs": "Require confirmation for:",
@@ -614,7 +614,7 @@
         "security": "Security",
         "security_tab": "Security",
         "sensitive_by_default": "Mark posts as sensitive by default",
-        "sensitive_if_subject": "Automatically mark images as sensitive if a subject line is specified",
+        "sensitive_if_subject": "Automatically mark images as sensitive if a content warning is specified",
         "set_new_avatar": "Set new avatar",
         "set_new_mascot": "Set new mascot",
         "set_new_profile_background": "Set new profile background",
@@ -777,9 +777,9 @@
                 "use_source": "New version"
             }
         },
-        "subject_input_always_show": "Always show subject field",
-        "subject_line_behavior": "Copy subject when replying",
-        "subject_line_email": "Like email: \"re: subject\"",
+        "subject_input_always_show": "Always show content warning field",
+        "subject_line_behavior": "Copy content warning when replying",
+        "subject_line_email": "Like email: \"re: warning\"",
         "subject_line_mastodon": "Like mastodon: copy as is",
         "subject_line_noop": "Do not copy",
         "text": "Text",
@@ -838,7 +838,7 @@
         "favorites": "Favorites",
         "hide_attachment": "Hide attachment",
         "hide_content": "Hide content",
-        "hide_full_subject": "Hide full subject",
+        "hide_full_subject": "Hide full content warning",
         "many_attachments": "Post has {number} attachment | Post has {number} attachments",
         "mentions": "Mentions",
         "move_down": "Shift attachment right",
@@ -865,7 +865,7 @@
         "show_attachment_description": "Preview description (open attachment for full description)",
         "show_attachment_in_modal": "Show attachment in a window",
         "show_content": "Show content",
-        "show_full_subject": "Show full subject",
+        "show_full_subject": "Show full content warning",
         "show_only_conversation_under_this": "Only show replies to this post",
         "status_deleted": "This post was deleted",
         "status_unavailable": "Post unavailable",
diff --git a/src/modules/config.js b/src/modules/config.js
index 94b52e92..e0530101 100644
--- a/src/modules/config.js
+++ b/src/modules/config.js
@@ -34,7 +34,7 @@ export const defaultState = {
   hideThreadsWithBlockedUsers: undefined, // instance default
   hideWordFilteredPosts: undefined, // instance default
   muteBotStatuses: undefined, // instance default
-  collapseMessageWithSubject: undefined, // instance default
+  collapseMessageWithSubject: true, // instance default
   padEmoji: true,
   showNavShortcuts: undefined, // instance default
   showPanelNavShortcuts: undefined, // instance default
diff --git a/src/modules/instance.js b/src/modules/instance.js
index f9118e16..5ab34f85 100644
--- a/src/modules/instance.js
+++ b/src/modules/instance.js
@@ -17,7 +17,7 @@ const defaultState = {
   defaultAvatar: '/images/avi.png',
   defaultBanner: '/images/banner.png',
   background: '/static/aurora_borealis.jpg',
-  collapseMessageWithSubject: false,
+  collapseMessageWithSubject: true,
   greentext: false,
   useAtIcon: false,
   mentionLinkDisplay: 'short',