Add multilingual to the language tag

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

README.md

@@ -2,13 +2,14 @@
 language:
 - en
 - el
+- multilingual
+license: apache-2.0
 tags:
 - translation
-widget:
-- text: "'Katerina', is the best name for a girl."
-license: apache-2.0
 metrics:
 - bleu
+widget:
+- text: '''Katerina'', is the best name for a girl.'
 ---
 
 ## English to Greek NMT