diff --git a/spip2md/converter.py b/spip2md/converter.py
index 761b3ac..30e1513 100644
--- a/spip2md/converter.py
+++ b/spip2md/converter.py
@@ -257,23 +257,25 @@ unknownIso = (compile(r"\w*
.*\r?\n"),)  # unknown 
 + surroundings
 
 def convertBody(spipBody):
     text = spipBody
+    errors = []
     for spip, markdown in spipToMarkdown:
         text = spip.sub(markdown, text)
     for iso, utf in isoToUtf:
         text = iso.sub(utf, text)
     for iso in unknownIso:
         for match in iso.finditer(text):
-            print(f"    UNKNOWN CHARACTER {match.group()}")
-    return text
+            errors.append(match.group())
+    return text, errors
 
 
 def convertMeta(spipMeta):
     text = spipMeta
+    errors = []
     for spip, metadata in spipToText:
         text = spip.sub(metadata, text)
     for iso, utf in isoToUtf:
         text = iso.sub(utf, text)
     for iso in unknownIso:
         for match in iso.finditer(text):
-            print(f"    UNKNOWN CHARACTER {match.group()}")
-    return text
+            errors.append(match.group())
+    return text, errors
diff --git a/spip2md/iterator.py b/spip2md/iterator.py
index b584241..a359a6d 100644
--- a/spip2md/iterator.py
+++ b/spip2md/iterator.py
@@ -9,12 +9,12 @@ class Article:
     def __init__(self, article):
         self.id = article.id_article
         # self.surtitle = article.surtitre  # Probably unused
-        self.title = convertMeta(article.titre)
+        self.title, self.title_unknown = convertMeta(article.titre)
         self.subtitle = article.soustitre  # Probably unused
         # self.section = article.id_rubrique # TODO join
-        self.description = convertMeta(article.descriptif)
+        self.description, self.description_unknown = convertMeta(article.descriptif)
         self.caption = article.chapo  # Probably unused
-        self.text = convertBody(article.texte)  # Markdown
+        self.text, self.text_unknown = convertBody(article.texte)  # Markdown
         self.ps = article.ps  # Probably unused
         self.publicationDate = article.date
         self.draft = False if article.statut == "publie" else True