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-rw-r--r--app/lib/language_detector.rb4
-rw-r--r--spec/lib/language_detector_spec.rb10
2 files changed, 13 insertions, 1 deletions
diff --git a/app/lib/language_detector.rb b/app/lib/language_detector.rb
index 688d21fd8..58c8e2069 100644
--- a/app/lib/language_detector.rb
+++ b/app/lib/language_detector.rb
@@ -12,6 +12,7 @@ class LanguageDetector
   def detect(text, account)
     input_text = prepare_text(text)
     return if input_text.blank?
+
     detect_language_code(input_text) || default_locale(account)
   end
 
@@ -33,6 +34,7 @@ class LanguageDetector
 
   def detect_language_code(text)
     return if unreliable_input?(text)
+
     result = @identifier.find_language(text)
     iso6391(result.language.to_s).to_sym if result.reliable?
   end
@@ -75,6 +77,6 @@ class LanguageDetector
   end
 
   def default_locale(account)
-    account.user_locale&.to_sym || I18n.default_locale
+    return account.user_locale&.to_sym || I18n.default_locale if account.local?
   end
 end
diff --git a/spec/lib/language_detector_spec.rb b/spec/lib/language_detector_spec.rb
index cdc51a656..0fa2a59ef 100644
--- a/spec/lib/language_detector_spec.rb
+++ b/spec/lib/language_detector_spec.rb
@@ -42,6 +42,7 @@ describe LanguageDetector do
 
   describe 'detect' do
     let(:account_without_user_locale) { Fabricate(:user, locale: nil).account }
+    let(:account_remote) { Fabricate(:account, domain: 'joinmastodon.org') }
 
     it 'detects english language for basic strings' do
       strings = [
@@ -104,6 +105,15 @@ describe LanguageDetector do
         end
       end
 
+      describe 'remote user' do
+        it 'nil for foreign user when language is not present' do
+          string = '안녕하세요'
+          result = described_class.instance.detect(string, account_remote)
+
+          expect(result).to eq nil
+        end
+      end
+
       describe 'with a non-`en` default locale' do
         around(:each) do |example|
           before = I18n.default_locale