diff --git a/src/qwc2_viewer.py b/src/qwc2_viewer.py
index 5b6ab48..dbf4678 100644
--- a/src/qwc2_viewer.py
+++ b/src/qwc2_viewer.py
@@ -837,7 +837,7 @@ def translate_designer_form(self, path, lang):
 
         # Attempt to load translation file
         try:
-            with open(translation_path, 'r') as fh:
+            with open(full_path, 'r', encoding='utf-8') as fh:
                 translation = fh.read()
         except:
             return Response(form, mimetype='text/xml')