Add Estonian (credit: @indasin)

core/language/zhc.json

@@ -2,24 +2,25 @@
 	"selectmenu": {
 		"selectlanguage": "选择语言",
 		"languageflag": "zhc",
-		"english": "英文",
 		"chinese1": "简体中文",
 		"chinese2": "繁体中文",
-		"german": "德文",
-		"french": "法文",
-		"polish": "波兰文",
-		"spanish": "西班牙文",
-		"hindi": "印度文",
 		"croatian": "克罗地亚文",
-		"portuguese": "葡萄牙文",
+		"english": "英文",
+		"estonian": "爱沙尼亚文",
+		"french": "法文",
+		"german": "德文",
+		"hindi": "印度文",
 		"hungarian": "匈牙利文",
-		"serbian": "塞尔维亚文",
 		"italian": "意大利文",
-		"russian": "俄语",
-		"norwegian": "挪威语",
-		"romanian": "罗马尼亚语",
+		"japanese": "日语",
 		"korean": "韩语",
-		"japanese": "日语"
+		"norwegian": "挪威语",
+		"polish": "波兰文",
+		"portuguese": "葡萄牙文",
+		"romanian": "罗马尼亚语",
+		"russian": "俄语",
+		"serbian": "塞尔维亚文",
+		"spanish": "西班牙文"
 	},
 	"sidemenu": {
 		"minting": "铸币",