diff --git a/Lib/gftools/utils.py b/Lib/gftools/utils.py
index f6620f23e..9b73c029e 100644
--- a/Lib/gftools/utils.py
+++ b/Lib/gftools/utils.py
@@ -470,7 +470,7 @@ def _add_words(words, text, seen_chars):
 
     _add_words(words, uhdr, seen_chars)
 
-    if not words:
+    if len(seen_chars) < len(cmap):
         languages = LoadLanguages()
         for file, proto in languages.items():
             if hasattr(proto, "sample_text"):