--- a/svghmi/i18n.py	Thu Apr 01 15:51:24 2021 +0200
+++ b/svghmi/i18n.py	Thu Apr 01 15:56:19 2021 +0200
@@ -71,19 +71,17 @@
 def GetPoFiles(dirpath):
     po_files = [fname for fname in os.listdir(dirpath) if fname.endswith(".po")]
     po_files.sort()
-    return po_files
+    return [(po_fname[:-3],os.path.join(dirpath, po_fname)) for po_fname in po_files]
 
 def ReadTranslations(dirpath):
     """ Read all PO files from a directory and return a list of (langcode, translation_dict) tuples """
 
-    po_files = GetPoFiles(dirpath)
-
     translations = []
-    for po_fname in po_files:
+    for translation_name, po_path in GetPoFiles(dirpath):
         r = POReader()
-        with open(os.path.join(dirpath, po_fname), 'r') as PO_file:
+        with open(po_path, 'r') as PO_file:
             r.read(PO_file)
-            translations.append((po_fname[:-3], r.get_messages()))
+            translations.append((translation_name, r.get_messages()))
     return translations
 
 def MatchTranslations(translations, messages, errcallback):

--- a/svghmi/svghmi.py	Thu Apr 01 15:51:24 2021 +0200
+++ b/svghmi/svghmi.py	Thu Apr 01 15:56:19 2021 +0200
@@ -451,8 +451,9 @@
 
             hasher = hashlib.md5()
             hmi_tree_root._hash(hasher)
+            pofiles = GetPoFiles(self.CTNPath())
             filestocheck = [svgfile] + \
-                           GetPoFiles(self.CTNPath()) + \
+                           (list(zip(*pofiles)[1]) if pofiles else []) + \
                            self.GetFontsFiles()
 
             for filetocheck in filestocheck: