Add language/tag to privacy URI

app/src/main/java/eu/faircode/email/ActivitySetup.java

@@ -522,7 +522,7 @@ public class ActivitySetup extends ActivityBase implements FragmentManager.OnBac
     }
 
     private void onMenuPrivacy() {
-        Helper.view(this, Uri.parse(Helper.PRIVACY_URI), false);
+        Helper.view(this, Helper.getPrivacyUri(this), false);
     }
 
     private void onMenuAbout() {

app/src/main/java/eu/faircode/email/ActivityView.java

@@ -1332,7 +1332,7 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
     }
 
     private void onMenuPrivacy() {
-        Helper.view(this, Uri.parse(Helper.PRIVACY_URI), false);
+        Helper.view(this, Helper.getPrivacyUri(this), false);
     }
 
     private void onMenuAbout() {

app/src/main/java/eu/faircode/email/FragmentSetup.java

@@ -167,7 +167,7 @@ public class FragmentSetup extends FragmentBase {
         tvPrivacy.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Helper.view(v.getContext(), Uri.parse(Helper.PRIVACY_URI), false);
+                Helper.view(v.getContext(), Helper.getPrivacyUri(v.getContext()), false);
             }
         });
 

app/src/main/java/eu/faircode/email/Helper.java

@@ -778,6 +778,15 @@ public class Helper {
         return prefs.getString("openpgp_provider", "org.sufficientlysecure.keychain");
     }
 
+    static Uri getPrivacyUri(Context context) {
+        // https://translate.google.com/translate?sl=auto&tl=<language>&u=<url>
+        return Uri.parse(PRIVACY_URI)
+                .buildUpon()
+                .appendQueryParameter("language", Locale.getDefault().getLanguage())
+                .appendQueryParameter("tag", Locale.getDefault().toLanguageTag())
+                .build();
+    }
+
     static Uri getSupportUri(Context context) {
         return Uri.parse(SUPPORT_URI)
                 .buildUpon()