Qt: Add Japanese translation by mikakunin

CONTRIBUTORS.md

@@ -17,6 +17,7 @@ The following people have contributed to the project in some way, and are credit
 - @r57zone - Russian
 - @DenSinH - Dutch
 - @BenjaminSiskoo - French
+- mikakunin - Japanese
 
 ## Cheat Database
 - Pugsy

src/duckstation-qt/duckstation-qt.vcxproj

@@ -279,6 +279,7 @@
     <None Include="translations\duckstation-qt_it.ts" />
     <None Include="translations\duckstation-qt_nl.ts" />
     <None Include="translations\duckstation-qt_ru.ts" />
+    <None Include="translations\duckstation-qt_ja.ts" />
   </ItemGroup>
   <Target Name="CopyCommonDataFiles" AfterTargets="Build" Inputs="@(CommonDataFiles)" Outputs="@(CommonDataFiles -> '$(BinaryOutputDir)%(RecursiveDir)%(Filename)%(Extension)')">
     <Message Text="Copying common data files" Importance="High" />

src/duckstation-qt/duckstation-qt.vcxproj.filters

@@ -175,6 +175,9 @@
     <None Include="translations\duckstation-qt_fr.ts">
       <Filter>translations</Filter>
     </None>
+    <None Include="translations\duckstation-qt_ja.ts">
+      <Filter>translations</Filter>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <QtResource Include="resources\resources.qrc">

src/duckstation-qt/qthostinterface.cpp

@@ -64,6 +64,7 @@ std::vector<std::pair<QString, QString>> QtHostInterface::getAvailableLanguageLi
           {QStringLiteral("Español"), QStringLiteral("es")},
           {QStringLiteral("Français"), QStringLiteral("fr")},
           {QStringLiteral("עברית"), QStringLiteral("he")},
+          {QStringLiteral("日本語"), QStringLiteral("ja")},
           {QStringLiteral("Italiano"), QStringLiteral("it")},
           {QStringLiteral("Nederlands"), QStringLiteral("nl")},
           {QStringLiteral("Português (Pt)"), QStringLiteral("pt-pt")},