int error in final output lines

utils.py

@@ -60,6 +60,10 @@ def align_text(txt1: str, txt2: str, lang1: str, lang2: str) -> pd.DataFrame:
 
     data = []
     for from_paragraph, to_paragraph in zip(paragraphs_from, paragraphs_to):
+        if isinstance(from_paragraph, int) or isinstance(to_paragraph, int):
+            print("from_paragraph:", from_paragraph)
+            print("to_paragraph:", to_paragraph)
+            continue
         for from_line, to_line in zip(from_paragraph, to_paragraph):
             data.append({"From": from_line, "To": to_line})