Add language tag

Hi
A PR to improve the referencing of your dataset 🤗

README.md

@@ -38,6 +38,16 @@ dataset_info:
     num_examples: 6049
   download_size: 116856833
   dataset_size: 200310654
+language:
+- en
+- es
+- fr
+- de
+- it
+- ca
+- pl
+- ru
+- nl
 ---
 # Dataset Card for "Ted2020_en_es_fr_de_it_ca_pl_ru_nl"