Fix auto detect language for translate service (#19244)

2 files changed, 3 insertions, 2 deletions

diff --git a/app/lib/translation_service/deepl.rb b/app/lib/translation_service/deepl.rb
index 89ccf01e5..b75b604a8 100644
--- a/app/lib/translation_service/deepl.rb
+++ b/app/lib/translation_service/deepl.rb
@@ -28,7 +28,7 @@ class TranslationService::DeepL < TranslationService
   private
 
   def request(text, source_language, target_language)
-    req = Request.new(:post, endpoint_url, form: { text: text, source_lang: source_language.upcase, target_lang: target_language, tag_handling: 'html' })
+    req = Request.new(:post, endpoint_url, form: { text: text, source_lang: source_language&.upcase, target_lang: target_language, tag_handling: 'html' })
     req.add_headers('Authorization': "DeepL-Auth-Key #{@api_key}")
     req
   end
diff --git a/app/lib/translation_service/libre_translate.rb b/app/lib/translation_service/libre_translate.rb
index 66acdeed7..8cf26f868 100644
--- a/app/lib/translation_service/libre_translate.rb
+++ b/app/lib/translation_service/libre_translate.rb
@@ -26,7 +26,8 @@ class TranslationService::LibreTranslate < TranslationService
   private
 
   def request(text, source_language, target_language)
-    req = Request.new(:post, "#{@base_url}/translate", body: Oj.dump(q: text, source: source_language, target: target_language, format: 'html', api_key: @api_key))
+    body = Oj.dump(q: text, source: source_language.presence || 'auto', target: target_language, format: 'html', api_key: @api_key)
+    req = Request.new(:post, "#{@base_url}/translate", body: body)
     req.add_headers('Content-Type': 'application/json')
     req
   end