Support translating strings in emulator core

src/core/host_interface.h

@@ -109,6 +109,10 @@ public:
   /// Returns a float setting from the configuration.
   virtual float GetFloatSettingValue(const char* section, const char* key, float default_value = 0.0f);
 
+  /// Translates a string to the current language.
+  virtual TinyString TranslateString(const char* context, const char* str) const;
+  virtual std::string TranslateStdString(const char* context, const char* str) const;
+
   /// Loads the BIOS image for the specified region.
   std::optional<std::vector<u8>> GetBIOSImage(ConsoleRegion region);
 
@@ -164,4 +168,6 @@ protected:
   std::string m_user_directory;
 };
 
+#define TRANSLATABLE(context, str) str
+
 extern HostInterface* g_host_interface;