Add the new translation to the build.

src/lang.qrc

@@ -35,6 +35,7 @@
   <file>lang/qbittorrent_sv.qm</file>
   <file>lang/qbittorrent_tr.qm</file>
   <file>lang/qbittorrent_uk.qm</file>
+  <file>lang/qbittorrent_vi.qm</file>
   <file>lang/qbittorrent_zh.qm</file>
   <file>lang/qbittorrent_zh_TW.qm</file>
 </qresource>

src/preferences/options_imp.cpp

@@ -1344,6 +1344,7 @@ QString options_imp::languageToLocalizedString(QLocale::Language language, const
   case QLocale::Georgian: return QString::fromUtf8("ქართული");
   case QLocale::Byelorussian: return QString::fromUtf8("Беларуская");
   case QLocale::Basque: return QString::fromUtf8("Euskara");
+  case QLocale::Vietnamese: return QString::fromUtf8("tiếng Việt");
   case QLocale::Chinese: {
     if (country == "cn")
       return QString::fromUtf8("中文 (简体)");

src/src.pro

@@ -242,4 +242,5 @@ TRANSLATIONS = $$LANG_PATH/qbittorrent_fr.ts \
                $$LANG_PATH/qbittorrent_ka.ts \
                $$LANG_PATH/qbittorrent_be.ts \
                $$LANG_PATH/qbittorrent_eu.ts \
-               $$LANG_PATH/qbittorrent_he.ts
+               $$LANG_PATH/qbittorrent_he.ts \
+               $$LANG_PATH/qbittorrent_vi.ts