Add multilingual to the language tag

Hi! A PR to add multilingual to the language tag to improve the referencing.

README.md

@@ -2,9 +2,10 @@
 language:
 - en
 - ja
+- multilingual
+license: cc-by-nc-4.0
 tags:
 - nllb
-license: cc-by-nc-4.0
 ---
 
 # NLLB 1.3B fine-tuned on Japanese to English Light Novel translation