add i18n

messages/zh-CN/alphabet.json

@@ -0,0 +1,13 @@
+{
+  "chooseCharacters": "请选择您想学习的字符",
+  "japanese": "日语假名",
+  "english": "英文字母",
+  "uyghur": "维吾尔字母",
+  "esperanto": "世界语字母",
+  "loading": "加载中...",
+  "loadFailed": "加载失败，请重试",
+  "hideLetter": "隐藏字母",
+  "showLetter": "显示字母",
+  "hideIPA": "隐藏IPA",
+  "showIPA": "显示IPA"
+}