Fix language tag name and multilinguality

README.md

@@ -4,9 +4,8 @@ annotations_creators:
 - expert-generated
 language_creators:
 - found
-languages:
+language:
 - en
-multilinguality:
 - bg
 - cs
 - da
@@ -30,6 +29,8 @@ multilinguality:
 - sk
 - sl
 - sv
+multilinguality:
+- multilingual
 pretty_name: ELRC-Medical-V2
 size_categories:
 - 100K<n<1M