[BUG FIX] ISI parser if no language in metadata of each notice.

parsing/FileParsers/FileParser.py

@@ -77,9 +77,9 @@ class FileParser:
                 if language:
                     break
         if language:
-            metadata["language_iso2"] = language.iso2
-            metadata["language_iso3"] = language.iso3
-            metadata["language_fullname"] = language.fullname
+            metadata["language_iso2"]       = language.iso2
+            metadata["language_iso3"]       = language.iso3
+            metadata["language_fullname"]   = language.fullname
         return metadata
         
     def format_metadata(self, metadata):

parsing/FileParsers/RisFileParser.py

@@ -36,6 +36,10 @@ class RisFileParser(FileParser):
                             #print(metadata)
                             try:
                                 #print("append")
+                                if 'language_fullname' not in metadata.keys():
+                                    if 'language_iso3' not in metadata.keys():
+                                        if 'language_iso2' not in metadata.keys():
+                                            metadata['language_iso2'] = 'en'
                                 metadata_list.append(metadata)
                                 metadata = {}
                                 #print("append succeeded")