Update README.md to include ISO code for Nahuatl

Source

Wiki: https://en.wikipedia.org/wiki/Nahuatl

README.md

@@ -5,6 +5,7 @@ language_creators:
 - expert-generated
 language:
 - es
+- nah
 license:
 - mpl-2.0
 multilinguality:
@@ -17,15 +18,19 @@ task_categories:
 - text2text-generation
 - translation
 task_ids: []
-pretty_name: "Axolotl Spanish-Nahuatl parallel corpus , is a digital corpus that compiles\
-  \ several sources with parallel content in these two languages. \n\nA parallel corpus\
-  \ is a type of corpus that contains texts in a source language with their correspondent\
-  \ translation in one or more target languages. Gutierrez-Vasques, X., Sierra, G.,\
-  \ and Pompa, I. H. (2016). Axolotl: a web accessible parallel corpus for spanish-nahuatl.\
-  \ In Proceedings of the Ninth International Conference on Language Resources and\
-  \ Evaluation (LREC 2016), Portoro, Slovenia. European Language Resources Association\
-  \ (ELRA). Grupo de Ingenieria Linguistica (GIL, UNAM). Corpus paralelo español-nahuatl.\
-  \ http://www.corpus.unam.mx/axolotl."
+pretty_name: >-
+  Axolotl Spanish-Nahuatl parallel corpus , is a digital corpus that compiles
+  several sources with parallel content in these two languages. 
+
+
+  A parallel corpus is a type of corpus that contains texts in a source language
+  with their correspondent translation in one or more target languages.
+  Gutierrez-Vasques, X., Sierra, G., and Pompa, I. H. (2016). Axolotl: a web
+  accessible parallel corpus for spanish-nahuatl. In Proceedings of the Ninth
+  International Conference on Language Resources and Evaluation (LREC 2016),
+  Portoro, Slovenia. European Language Resources Association (ELRA). Grupo de
+  Ingenieria Linguistica (GIL, UNAM). Corpus paralelo español-nahuatl.
+  http://www.corpus.unam.mx/axolotl.
 language_bcp47:
 - es-MX
 tags: