Rename Chinese language options for clarity and better sorting.

Replace "Chinese (China)" with "Chinese (Simplified)" and "Chinese
(Taiwan)" with "Chinese (Traditional)". This keeps both items adjacent
in the language dropdown, uses script-accurate naming, and avoids any
geographic misinterpretation.

Author: yjdyamv

src/core/Translator.cpp

@@ -121,8 +121,11 @@ QList<QPair<QString, QString>> Translator::availableLanguages()
             if (langcode == "la") {
                 // langcode "la" (Latin) is translated into "C" by QLocale::languageToString()
                 languageStr = "Latin";
-            }
-            if (langcode.contains("_")) {
+            } else if (langcode == "zh_CN") {
+                languageStr = "Chinese (Simplified)";
+            } else if (langcode == "zh_TW") {
+                languageStr = "Chinese (Traditional)";
+            } else if (langcode.contains("_")) {
                 languageStr += QString(" (%1)").arg(QLocale::countryToString(locale.country()));
             }
 

src/gui/AboutDialog.cpp

@@ -285,8 +285,8 @@ static const QString aboutContributors = R"(
 <h3>Translations:</h3>
 <ul>
     <li><strong>Arabic:</strong> kmutahar</li>
-    <li><strong>Chinese (China):</strong> Biggulu, Brandon_c, hoilc, ligyxy, Small_Ku, umi_neko, vc5</li>
-    <li><strong>Chinese (Taiwan):</strong> BestSteve, flachesis, MiauLightouch, Small_Ku, yan12125, ymhuang0808</li>
+    <li><strong>Chinese (Simplified):</strong> Biggulu, Brandon_c, hoilc, ligyxy, Small_Ku, umi_neko, vc5</li>
+    <li><strong>Chinese (Traditional):</strong> BestSteve, flachesis, MiauLightouch, Small_Ku, yan12125, ymhuang0808</li>
     <li><strong>Czech:</strong> DanielMilde, pavelb, tpavelek</li>
     <li><strong>English (United Kingdom):</strong> YCMHARHZ</li>
     <li><strong>English (United States):</strong> alexandercrice, DarkHolme, nguyenlekhtn</li>