diff --git a/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java b/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java
index cb5c6a3a..3a40aaed 100644
--- a/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java
@@ -8,6 +8,7 @@ import android.graphics.Typeface;
 import android.os.Bundle;
 import android.support.annotation.DrawableRes;
 import android.support.annotation.LayoutRes;
+import android.support.annotation.StringRes;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
@@ -40,6 +41,7 @@ public class BaseActivity extends AppCompatActivity {
     @Nonnull
     protected final Tabs tabs;
     private final int layoutId;
+    private final int titleId;
     @Inject
     SharedPreferences preferences;
     @Inject
@@ -69,12 +71,13 @@ public class BaseActivity extends AppCompatActivity {
     @Nonnull
     private Language language = Languages.SYSTEM_LANGUAGE;
 
-    public BaseActivity() {
-        this(R.layout.activity_tabs);
+    public BaseActivity(@StringRes int titleId) {
+        this(R.layout.activity_tabs, titleId);
     }
 
-    public BaseActivity(@LayoutRes int layout) {
-        this.layoutId = layout;
+    public BaseActivity(@LayoutRes int layoutId, @StringRes int titleId) {
+        this.layoutId = layoutId;
+        this.titleId = titleId;
         this.tabs = new Tabs(this);
     }
 
@@ -139,6 +142,11 @@ public class BaseActivity extends AppCompatActivity {
 
     private void createView() {
         setContentView(layoutId);
+        // title must be updated as if a non-system language is used the value from AndroidManifest
+        // might be cached
+        if (titleId != 0) {
+            setTitle(titleId);
+        }
         ButterKnife.bind(this, this);
 
         fixFonts(mainView);
@@ -177,7 +185,7 @@ public class BaseActivity extends AppCompatActivity {
         setTheme(theme.getThemeFor(this));
 
         layout = Preferences.Gui.getLayout(preferences);
-        language = App.getLanguages().getCurrent();
+        language = languages.getCurrent();
     }
 
     protected void populateTabs(@Nonnull Tabs tabs) {
diff --git a/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java b/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
index ae408e9d..d28956ae 100644
--- a/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
@@ -82,7 +82,7 @@ public class CalculatorActivity extends BaseActivity implements SharedPreference
     private boolean useBackAsPrevious;
 
     public CalculatorActivity() {
-        super(R.layout.activity_main);
+        super(R.layout.activity_main, R.string.c_app_name);
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/about/AboutActivity.java b/app/src/main/java/org/solovyev/android/calculator/about/AboutActivity.java
index a3f3223f..5bd6a65e 100644
--- a/app/src/main/java/org/solovyev/android/calculator/about/AboutActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/about/AboutActivity.java
@@ -28,12 +28,17 @@ import android.support.annotation.NonNull;
 import org.solovyev.android.calculator.App;
 import org.solovyev.android.calculator.BaseActivity;
 import org.solovyev.android.calculator.FragmentTab;
+import org.solovyev.android.calculator.R;
 import org.solovyev.android.calculator.view.Tabs;
 
 import javax.annotation.Nonnull;
 
 public class AboutActivity extends BaseActivity {
 
+    public AboutActivity() {
+        super(R.string.cpp_about);
+    }
+
     public static class Dialog extends AboutActivity {
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/functions/FunctionsActivity.java b/app/src/main/java/org/solovyev/android/calculator/functions/FunctionsActivity.java
index 172677d6..82ec8d2d 100644
--- a/app/src/main/java/org/solovyev/android/calculator/functions/FunctionsActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/functions/FunctionsActivity.java
@@ -40,6 +40,10 @@ public class FunctionsActivity extends BaseActivity {
 
     public static final String EXTRA_FUNCTION = "function";
 
+    public FunctionsActivity() {
+        super(R.string.c_functions);
+    }
+
     @Nonnull
     public static Class<? extends FunctionsActivity> getClass(@NonNull Context context) {
         return App.isTablet(context) ? Dialog.class : FunctionsActivity.class;
diff --git a/app/src/main/java/org/solovyev/android/calculator/history/HistoryActivity.java b/app/src/main/java/org/solovyev/android/calculator/history/HistoryActivity.java
index 9ece0b23..62953c93 100644
--- a/app/src/main/java/org/solovyev/android/calculator/history/HistoryActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/history/HistoryActivity.java
@@ -29,7 +29,12 @@ import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.support.v7.app.AlertDialog;
 import android.view.View;
-import org.solovyev.android.calculator.*;
+
+import org.solovyev.android.calculator.App;
+import org.solovyev.android.calculator.AppComponent;
+import org.solovyev.android.calculator.BaseActivity;
+import org.solovyev.android.calculator.FragmentTab;
+import org.solovyev.android.calculator.R;
 import org.solovyev.android.calculator.view.Tabs;
 
 import javax.annotation.Nonnull;
@@ -39,6 +44,10 @@ import static org.solovyev.android.calculator.FragmentTab.saved_history;
 
 public class HistoryActivity extends BaseActivity {
 
+    public HistoryActivity() {
+        super(R.string.c_history);
+    }
+
     public static class Dialog extends HistoryActivity {
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java b/app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java
index e0eb8a72..60447160 100644
--- a/app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java
@@ -22,15 +22,20 @@
 
 package org.solovyev.android.calculator.matrix;
 
-import android.os.Bundle;
 import org.solovyev.android.calculator.BaseActivity;
 import org.solovyev.android.calculator.FragmentTab;
+import org.solovyev.android.calculator.R;
 import org.solovyev.android.calculator.view.Tabs;
 
 import javax.annotation.Nonnull;
 
 public class CalculatorMatrixActivity extends BaseActivity {
 
+    public CalculatorMatrixActivity() {
+        super(R.string.c_plot_graph);
+        // FIXME: 2016-03-01 string
+    }
+
     @Override
     protected void populateTabs(@Nonnull Tabs tabs) {
         super.populateTabs(tabs);
diff --git a/app/src/main/java/org/solovyev/android/calculator/operators/OperatorsActivity.java b/app/src/main/java/org/solovyev/android/calculator/operators/OperatorsActivity.java
index dc36487e..0664d5e0 100644
--- a/app/src/main/java/org/solovyev/android/calculator/operators/OperatorsActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/operators/OperatorsActivity.java
@@ -35,6 +35,10 @@ import javax.annotation.Nonnull;
 
 public class OperatorsActivity extends BaseActivity {
 
+    public OperatorsActivity() {
+        super(R.string.c_operators);
+    }
+
     public static class Dialog extends OperatorsActivity {
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotActivity.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotActivity.java
index 0f26d3a1..ff7f6fdc 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotActivity.java
@@ -7,8 +7,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Toast;
-import butterknife.Bind;
-import butterknife.ButterKnife;
+
 import org.solovyev.android.calculator.AppComponent;
 import org.solovyev.android.calculator.BaseActivity;
 import org.solovyev.android.calculator.BaseFragment;
@@ -20,6 +19,9 @@ import org.solovyev.android.plotter.Plotter;
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 
+import butterknife.Bind;
+import butterknife.ButterKnife;
+
 public class PlotActivity extends BaseActivity {
 
     public static class MyFragment extends BaseFragment implements PlotViewFrame.Listener {
@@ -90,7 +92,7 @@ public class PlotActivity extends BaseActivity {
     }
 
     public PlotActivity() {
-        super(R.layout.activity_empty);
+        super(R.layout.activity_empty, R.string.c_plot);
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java b/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java
index e4c13835..bb66b057 100644
--- a/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java
@@ -58,7 +58,7 @@ public class PreferencesActivity extends BaseActivity implements SharedPreferenc
     Languages languages;
 
     public PreferencesActivity() {
-        super(R.layout.activity_empty);
+        super(R.layout.activity_empty, R.string.cpp_settings);
     }
 
     @Nonnull
diff --git a/app/src/main/java/org/solovyev/android/calculator/variables/VariablesActivity.java b/app/src/main/java/org/solovyev/android/calculator/variables/VariablesActivity.java
index 4671e227..6567f20c 100644
--- a/app/src/main/java/org/solovyev/android/calculator/variables/VariablesActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/variables/VariablesActivity.java
@@ -40,6 +40,10 @@ public class VariablesActivity extends BaseActivity {
 
     public static final String EXTRA_VARIABLE = "variable";
 
+    public VariablesActivity() {
+        super(R.string.c_vars_and_constants);
+    }
+
     @Nonnull
     public static Class<? extends VariablesActivity> getClass(@NonNull Context context) {
         return App.isTablet(context) ? Dialog.class : VariablesActivity.class;
diff --git a/app/src/main/java/org/solovyev/android/calculator/wizard/WizardActivity.java b/app/src/main/java/org/solovyev/android/calculator/wizard/WizardActivity.java
index 79c3bc1b..cc40ee7c 100644
--- a/app/src/main/java/org/solovyev/android/calculator/wizard/WizardActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/wizard/WizardActivity.java
@@ -49,7 +49,7 @@ public class WizardActivity extends BaseActivity implements WizardsAware, Shared
     Languages languages;
 
     public WizardActivity() {
-        super(R.layout.cpp_activity_wizard);
+        super(R.layout.cpp_activity_wizard, 0);
     }
 
     @Override