Rename Chinese language items to "Simplified/Traditional Chinese"

The previous labels "Chinese (China)" and "Chinese (Taiwan)" could be
misinterpreted as political divisions, while the actual difference is
the writing script. Changing to "Simplified Chinese" and "Traditional
Chinese" is more accurate and inclusive.

Author: yjdyamv

src/core/Translator.cpp

@@ -118,11 +118,14 @@ QList<QPair<QString, QString>> Translator::availableLanguages()
 
             QLocale locale(langcode);
             QString languageStr = QLocale::languageToString(locale.language());
-            if (langcode == "la") {
+            if (langcode == "zh_CN") {
+                languageStr = "Simplified Chinese";
+            } else if (langcode == "zh_TW") {
+                languageStr = "Traditional Chinese";
+            } else if (langcode == "la") {
                 // langcode "la" (Latin) is translated into "C" by QLocale::languageToString()
                 languageStr = "Latin";
-            }
-            if (langcode.contains("_")) {
+            } 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>Simplified Chinese:</strong> Biggulu, Brandon_c, hoilc, ligyxy, Small_Ku, umi_neko, vc5</li>
+    <li><strong>Traditional Chinese:</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>