Prefer language codes over language terms, using codes from the Code List for Languages in MARC21. Use subfield $l (Language term) only to provide information not available in the MARC Code List for Languages. Encode multiple languages for a person or corporate body only if more than one language is used for publication, communication, etc.
+
Prefer language codes over language terms, using codes from the Code List for Languages in MARC21. Use subfield $l (Language term) only to provide information not available in the [https://loc.gov/marc/languages/language_code.html MARC Code List for Languages]. Encode multiple languages for a person or corporate body only if more than one language is used for publication, communication, etc.