Add Estonian (credit: @indasin)

core/language/es.json

@@ -2,24 +2,25 @@
 	"selectmenu": {
 		"selectlanguage": "Seleccionar lenguaje",
 		"languageflag": "es",
-		"english": "Inglés",
 		"chinese1": "Chino (Simplificado)",
 		"chinese2": "Chino (Tradicional)",
-		"german": "Alemán",
-		"french": "Francés",
-		"polish": "Polaco",
-		"spanish": "Español",
-		"hindi": "Hindi",
 		"croatian": "Croata",
-		"portuguese": "Portugués",
+		"english": "Inglés",
+		"estonian": "Estonio",
+		"french": "Francés",
+		"german": "Alemán",
+		"hindi": "Hindi",
 		"hungarian": "Húngaro",
-		"serbian": "Serbio",
 		"italian": "Italiano",
-		"russian": "Ruso",
-		"norwegian": "Noruego",
-		"romanian": "Rumano",
+		"japanese": "Japonés",
 		"korean": "Coreano",
-		"japanese": "Japonés"
+		"norwegian": "Noruego",
+		"polish": "Polaco",
+		"portuguese": "Portugués",
+		"romanian": "Rumano",
+		"russian": "Ruso",
+		"serbian": "Serbio",
+		"spanish": "Español"
 	},
 	"sidemenu": {
 		"minting": "ACUÑACIÓN",