Add Spanish translation pipeline

config.json

@@ -40,6 +40,12 @@
       "num_beams": 4,
       "prefix": "translate English to French: "
     },
+    "translation_en_to_es": {
+      "early_stopping": true,
+      "max_length": 300,
+      "num_beams": 4,
+      "prefix": "translate English to Spanish: "
+    },
     "translation_en_to_ro": {
       "early_stopping": true,
       "max_length": 300,