diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 49372b3fa43..04e179adc11 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -221,7 +221,7 @@ en:
   too_many_links:
     one: "Sorry, new users can only put one link in a post."
     other: "Sorry, new users can only put %{count} links in a post."
-  contains_blocked_words: "Your post contains words that aren't allowed."
+  contains_blocked_words: "Your post contains a word that's not allowed: %{word}"
 
   spamming_host: "Sorry you cannot post a link to that host."
   user_is_suspended: "Suspended users are not allowed to post."
diff --git a/lib/new_post_manager.rb b/lib/new_post_manager.rb
index 39cf75cfaff..8eb03d32b6e 100644
--- a/lib/new_post_manager.rb
+++ b/lib/new_post_manager.rb
@@ -133,9 +133,9 @@ class NewPostManager
   end
 
   def perform
-    if !self.class.exempt_user?(@user) && WordWatcher.new("#{@args[:title]} #{@args[:raw]}").should_block?
+    if !self.class.exempt_user?(@user) && matches = WordWatcher.new("#{@args[:title]} #{@args[:raw]}").should_block?
       result = NewPostResult.new(:created_post, false)
-      result.errors[:base] << I18n.t('contains_blocked_words')
+      result.errors[:base] << I18n.t('contains_blocked_words', word: matches[0])
       return result
     end
 
diff --git a/lib/validators/post_validator.rb b/lib/validators/post_validator.rb
index 076dd2d086c..397a30b1761 100644
--- a/lib/validators/post_validator.rb
+++ b/lib/validators/post_validator.rb
@@ -58,8 +58,8 @@ class Validators::PostValidator < ActiveModel::Validator
   end
 
   def watched_words(post)
-    if !post.acting_user&.staff? && !post.acting_user&.staged && WordWatcher.new(post.raw).should_block?
-      post.errors[:base] << I18n.t('contains_blocked_words')
+    if !post.acting_user&.staff? && !post.acting_user&.staged && matches = WordWatcher.new(post.raw).should_block?
+      post.errors[:base] << I18n.t('contains_blocked_words', word: matches[0])
     end
   end
 
diff --git a/spec/integration/watched_words_spec.rb b/spec/integration/watched_words_spec.rb
index 03034e9b441..4aa7c267210 100644
--- a/spec/integration/watched_words_spec.rb
+++ b/spec/integration/watched_words_spec.rb
@@ -21,7 +21,7 @@ describe WatchedWord do
       expect {
         result = manager.perform
         expect(result).to_not be_success
-        expect(result.errors[:base]&.first).to eq(I18n.t('contains_blocked_words'))
+        expect(result.errors[:base]&.first).to eq(I18n.t('contains_blocked_words', word: block_word.word))
       }.to_not change { Post.count }
     end