Add multilingual to the language tag

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

README.md

@@ -1,15 +1,15 @@
 ---
 language:
-  - et
-  - en
-  - ru
-  - de
-
+- et
+- en
+- ru
+- de
+- multilingual
 tags:
-  - text-classification
-
+- text-classification
 widget:
-  - text: "Täna lõppes Valgamaa õppuse Siil aktiivne lahingutegevus, mille käigus pidi täielikult formeeritud 2. jalaväebrigaad kaitsma end vastase pealetungi eest."
+- text: T�na l�ppes Valgamaa �ppuse Siil aktiivne lahingutegevus, mille k�igus pidi
+    t�ielikult formeeritud 2. jalav�ebrigaad kaitsma end vastase pealetungi eest.
 ---
 
 A  domain detection model for the MTee machine translation platform. The platform was developed in 2021 as a collaboration between the [TartuNLP](https://tartunlp.ai), the NLP research group at the University of Tartu, and [Tilde](https://tilde.com). More information about the project can be found [here](https://github.com/Project-MTee/mtee-platform/wiki).