fix: try detect language only when fromLang is auto

src/hooks/Translate.js

@@ -30,11 +30,14 @@ export function useTranslate(q, rule, setting) {
           return;
         }
 
-        const deLang = await tryDetectLang(
-          q,
-          detectRemote === "true",
-          setting.langDetector
-        );
+        let deLang = "";
+        if (fromLang === "auto") {
+          deLang = await tryDetectLang(
+            q,
+            detectRemote === "true",
+            setting.langDetector
+          );
+        }
         if (deLang && (toLang.includes(deLang) || skipLangs.includes(deLang))) {
           setSamelang(true);
         } else {

src/views/Selection/TranCont.js

@@ -34,7 +34,7 @@ export default function TranCont({
         setError("");
 
         let to = toLang;
-        if (toLang !== toLang2 && toLang2 !== "none") {
+        if (fromLang === "auto" && toLang !== toLang2 && toLang2 !== "none") {
           const detectLang = await tryDetectLang(text, true, langDetector);
           if (detectLang === toLang) {
             to = toLang2;