结构大修改，改成朴实无华的结构，不过度架构。能跑就行

Assets/Scripts/NBC/Language/Runtime/Interfaces/ILanguage.cs

@@ -0,0 +1,27 @@
+using UnityEngine;
+
+namespace NBC
+{
+    public interface ILanguage
+    {
+        /// <summary>
+        /// 获取一个key对应的结果
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        string Get(string key);
+
+        /// <summary>
+        /// 添加一个多语言键值对
+        /// </summary>
+        /// <param name="language"></param>
+        void AddLanguage(SystemLanguage language);
+
+        /// <summary>
+        /// 使用某个语言，通过语言枚举
+        /// </summary>
+        /// <param name="language"></param>
+        /// <returns></returns>
+        bool UseLanguage(SystemLanguage language);
+    }
+}