oai-pmh.md

@@ -168,7 +168,7 @@ With oerhub version 1.3 and above we introduce Software Package Data Exchange (s
 ```
 This uri is expected: `https://spdx.org/licenses/<Identifier>`. <Identifier> is the Short Identifier. The link shows the remarks of the license.
 ### Language codes and translation
-Our own vocabs are archived in our index (Opensearch). The data is based on `https://www.loc.gov/standards/iso639-2/php/code_list.php`.
+Our own vocabs are archived in our index (Opensearch). The data for the language codes and translation is based on `https://www.loc.gov/standards/iso639-2/php/code_list.php`.
 
 ## Links
 - https://www.openarchives.org/