diff --git a/src/config/i18n.js b/src/config/i18n.js
index cd1ba1d..0cbed87 100644
--- a/src/config/i18n.js
+++ b/src/config/i18n.js
@@ -215,6 +215,14 @@ export const I18N = {
     zh: `目标语言`,
     en: `Target Language`,
   },
+  to_lang2: {
+    zh: `第二目标语言`,
+    en: `Target Language 2`,
+  },
+  to_lang2_helper: {
+    zh: `设定后，与目标语言产生互译效果，但依赖远程语言识别。`,
+    en: `After setting, it will produce mutual translation effect with the target language, but it relies on remote language recognition.`,
+  },
   text_style: {
     zh: `文字样式`,
     en: `Text Style`,
diff --git a/src/config/index.js b/src/config/index.js
index b25edcc..c3fc4c8 100644
--- a/src/config/index.js
+++ b/src/config/index.js
@@ -345,6 +345,7 @@ export const DEFAULT_TRANBOX_SETTING = {
   translator: OPT_TRANS_MICROSOFT,
   fromLang: "auto",
   toLang: "zh-CN",
+  toLang2: "en",
   tranboxShortcut: DEFAULT_TRANBOX_SHORTCUT,
   btnOffsetX: 10,
   btnOffsetY: 10,
diff --git a/src/views/Options/Tranbox.js b/src/views/Options/Tranbox.js
index 8813343..1b41a51 100644
--- a/src/views/Options/Tranbox.js
+++ b/src/views/Options/Tranbox.js
@@ -44,6 +44,7 @@ export default function Tranbox() {
     translator,
     fromLang,
     toLang,
+    toLang2 = "en",
     tranboxShortcut,
     btnOffsetX,
     btnOffsetY,
@@ -112,6 +113,22 @@ export default function Tranbox() {
           ))}
         </TextField>
 
+        <TextField
+          select
+          size="small"
+          name="toLang2"
+          value={toLang2}
+          label={i18n("to_lang2")}
+          helperText={i18n("to_lang2_helper")}
+          onChange={handleChange}
+        >
+          {[["none", "None"], ...OPT_LANGS_TO].map(([lang, name]) => (
+            <MenuItem key={lang} value={lang}>
+              {name}
+            </MenuItem>
+          ))}
+        </TextField>
+
         <TextField
           size="small"
           label={i18n("tranbtn_offset_x")}
diff --git a/src/views/Selection/TranBox.js b/src/views/Selection/TranBox.js
index d58522a..69fcffa 100644
--- a/src/views/Selection/TranBox.js
+++ b/src/views/Selection/TranBox.js
@@ -24,6 +24,7 @@ function TranForm({ text, setText, tranboxSetting, transApis }) {
   const [translator, setTranslator] = useState(tranboxSetting.translator);
   const [fromLang, setFromLang] = useState(tranboxSetting.fromLang);
   const [toLang, setToLang] = useState(tranboxSetting.toLang);
+  const [toLang2, setToLang2] = useState(tranboxSetting.toLang2);
   const inputRef = useRef(null);
 
   return (
@@ -150,6 +151,9 @@ function TranForm({ text, setText, tranboxSetting, transApis }) {
         translator={translator}
         fromLang={fromLang}
         toLang={toLang}
+        toLang2={toLang2}
+        setToLang={setToLang}
+        setToLang2={setToLang2}
         transApis={transApis}
       />
     </Stack>
diff --git a/src/views/Selection/TranCont.js b/src/views/Selection/TranCont.js
index 7a04432..af7c597 100644
--- a/src/views/Selection/TranCont.js
+++ b/src/views/Selection/TranCont.js
@@ -6,7 +6,7 @@ import Stack from "@mui/material/Stack";
 import { useI18n } from "../../hooks/I18n";
 import { DEFAULT_TRANS_APIS, OPT_TRANS_BAIDU } from "../../config";
 import { useEffect, useState } from "react";
-import { apiTranslate } from "../../apis";
+import { apiTranslate, apiBaiduLangdetect } from "../../apis";
 import { isValidWord } from "../../libs/utils";
 import CopyBtn from "./CopyBtn";
 import DictCont from "./DictCont";
@@ -16,6 +16,9 @@ export default function TranCont({
   translator,
   fromLang,
   toLang,
+  toLang2 = "en",
+  setToLang,
+  setToLang2,
   transApis,
 }) {
   const i18n = useI18n();
@@ -32,6 +35,16 @@ export default function TranCont({
         setError("");
         setDictResult(null);
 
+        // 互译
+        if (toLang !== toLang2 && toLang2 !== "none") {
+          const detectLang = await apiBaiduLangdetect(text);
+          if (detectLang === toLang) {
+            setToLang(toLang2);
+            setToLang2(toLang);
+            return;
+          }
+        }
+
         const apiSetting =
           transApis[translator] || DEFAULT_TRANS_APIS[translator];
         const tranRes = await apiTranslate({
@@ -63,7 +76,16 @@ export default function TranCont({
         setLoading(false);
       }
     })();
-  }, [text, translator, fromLang, toLang, transApis]);
+  }, [
+    text,
+    translator,
+    fromLang,
+    toLang,
+    toLang2,
+    setToLang,
+    setToLang2,
+    transApis,
+  ]);
 
   return (
     <>