diff --git a/res/values/attrs.xml b/res/values/attrs.xml
new file mode 100644
index 0000000..b012a7c
--- /dev/null
+++ b/res/values/attrs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <declare-styleable name="ExtraKeyCheckBoxPreference">
+    <attr name="index" format="integer"/>
+  </declare-styleable>
+</resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 78042ee..513b88f 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -12,6 +12,7 @@
   <string name="pref_accents_e_none">Hide accents</string>
   <string name="pref_autocapitalisation_title">Automatic capitalisation</string>
   <string name="pref_autocapitalisation_summary">Press Shift at the beginning of a sentence</string>
+  <string name="pref_extra_keys_title">Add keys to the keyboard</string>
   <string name="pref_programming_layout_title">Keyboard layout for programming</string>
   <string name="pref_programming_layout_none">None</string>
   <string name="pref_category_typing">Typing</string>
diff --git a/res/xml/settings.xml b/res/xml/settings.xml
index 6a87c4f..afe1546 100644
--- a/res/xml/settings.xml
+++ b/res/xml/settings.xml
@@ -1,9 +1,26 @@
 <?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">
   <PreferenceCategory android:title="@string/pref_category_layout">
     <ListPreference android:key="layout" android:title="@string/pref_layout_title" android:summary="%s" android:defaultValue="system" android:entries="@array/pref_layout_entries" android:entryValues="@array/pref_layout_values"/>
     <ListPreference android:key="accents" android:title="@string/pref_accents_title" android:summary="%s" android:defaultValue="1" android:entries="@array/pref_accents_entries" android:entryValues="@array/pref_accents_values"/>
     <ListPreference android:key="programming_layout" android:title="@string/pref_programming_layout_title" android:summary="%s" android:defaultValue="none" android:entries="@array/pref_programming_layout_entries" android:entryValues="@array/pref_programming_layout_values"/>
+    <PreferenceScreen android:title="@string/pref_extra_keys_title">
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="0"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="1"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="2"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="3"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="4"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="5"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="6"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="7"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="8"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="9"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="10"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="11"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="12"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="13"/>
+      <juloo.keyboard2.ExtraKeyCheckBoxPreference app:index="14"/>
+    </PreferenceScreen>
   </PreferenceCategory>
   <PreferenceCategory android:title="@string/pref_category_typing">
     <CheckBoxPreference android:key="autocapitalisation" android:title="@string/pref_autocapitalisation_title" android:summary="@string/pref_autocapitalisation_summary" android:defaultValue="true"/>
diff --git a/srcs/juloo.keyboard2/Config.java b/srcs/juloo.keyboard2/Config.java
index 9dbf556..0f2fd69 100644
--- a/srcs/juloo.keyboard2/Config.java
+++ b/srcs/juloo.keyboard2/Config.java
@@ -47,7 +47,8 @@ final class Config
   public String actionLabel; // Might be 'null'
   public int actionId; // Meaningful only when 'actionLabel' isn't 'null'
   public boolean swapEnterActionKey; // Swap the "enter" and "action" keys
-  public Set<KeyValue> extra_keys; // 'null' means all the keys
+  public Set<KeyValue> extra_keys_subtype;
+  public Set<KeyValue> extra_keys_param;
 
   public final IKeyEventHandler handler;
 
@@ -81,7 +82,7 @@ final class Config
     actionLabel = null;
     actionId = 0;
     swapEnterActionKey = false;
-    extra_keys = null;
+    extra_keys_subtype = null;
     handler = h;
   }
 
@@ -149,6 +150,7 @@ final class Config
     accents = Integer.valueOf(prefs.getString("accents", "1"));
     theme = getThemeId(res, prefs.getString("theme", ""));
     autocapitalisation = prefs.getBoolean("autocapitalisation", true);
+    extra_keys_param = ExtraKeyCheckBoxPreference.get_extra_keys(prefs);
   }
 
   /** Update the layout according to the configuration.
@@ -164,7 +166,9 @@ final class Config
       KeyValue.getKeyByName("action").withSymbol(actionLabel);
     // Extra keys are removed from the set as they are encountered during the
     // first iteration then automatically added.
-    final Set<KeyValue> extra_keys = new HashSet<KeyValue>(this.extra_keys);
+    final Set<KeyValue> extra_keys = new HashSet<KeyValue>();
+    extra_keys.addAll(extra_keys_subtype);
+    extra_keys.addAll(extra_keys_param);
     KeyboardData kw = original_kw.mapKeys(new KeyboardData.MapKeyValues() {
       public KeyValue apply(KeyValue key, boolean localized)
       {
diff --git a/srcs/juloo.keyboard2/EmojiKeyButton.java b/srcs/juloo.keyboard2/EmojiKeyButton.java
index 7fd3583..4463169 100644
--- a/srcs/juloo.keyboard2/EmojiKeyButton.java
+++ b/srcs/juloo.keyboard2/EmojiKeyButton.java
@@ -18,7 +18,7 @@ public class EmojiKeyButton extends Button
     _key = (key_name == null) ? null : KeyValue.getKeyByName(key_name);
     setText(_key.getString());
     if (_key.hasFlags(KeyValue.FLAG_KEY_FONT))
-      setTypeface(Theme.getSpecialKeyFont(context));
+      setTypeface(Theme.getKeyFont(context));
   }
 
   public void onClick(View v)
diff --git a/srcs/juloo.keyboard2/ExtraKeyCheckBoxPreference.java b/srcs/juloo.keyboard2/ExtraKeyCheckBoxPreference.java
new file mode 100644
index 0000000..887476a
--- /dev/null
+++ b/srcs/juloo.keyboard2/ExtraKeyCheckBoxPreference.java
@@ -0,0 +1,72 @@
+package juloo.keyboard2;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.content.SharedPreferences;
+import android.preference.CheckBoxPreference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.TextView;
+import java.util.HashSet;
+import java.util.Set;
+
+public class ExtraKeyCheckBoxPreference extends CheckBoxPreference
+{
+  public static String[] extra_keys = new String[]
+  {
+    "accent_aigu",
+    "accent_grave",
+    "accent_double_aigu",
+    "accent_dot_above",
+    "accent_circonflexe",
+    "accent_tilde",
+    "accent_cedille",
+    "accent_trema",
+    "accent_ring",
+    "accent_caron",
+    "accent_macron",
+    "accent_ogonek",
+    "€",
+    "ß",
+    "£"
+  };
+
+  boolean _key_font;
+
+  public ExtraKeyCheckBoxPreference(Context context, AttributeSet attrs)
+  {
+    super(context, attrs);
+    final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ExtraKeyCheckBoxPreference);
+    int index = a.getInteger(R.styleable.ExtraKeyCheckBoxPreference_index, 0);
+    a.recycle();
+    String key_name = extra_keys[index];
+    setKey(pref_key_of_key_name(key_name));
+    KeyValue kv = KeyValue.getKeyByName(key_name);
+    setTitle(kv.getString());
+    _key_font = kv.hasFlags(KeyValue.FLAG_KEY_FONT);
+  }
+
+  @Override
+  protected void onBindView(View view)
+  {
+    super.onBindView(view);
+    TextView title = (TextView)view.findViewById(android.R.id.title);
+    title.setTypeface(_key_font ? Theme.getKeyFont(getContext()) : null);
+  }
+
+  static String pref_key_of_key_name(String key_name)
+  {
+    return "extra_key_" + key_name;
+  }
+
+  public static Set<KeyValue> get_extra_keys(SharedPreferences prefs)
+  {
+    HashSet<KeyValue> ks = new HashSet<KeyValue>();
+    for (String key_name : extra_keys)
+    {
+      if (prefs.getBoolean(pref_key_of_key_name(key_name), false))
+        ks.add(KeyValue.getKeyByName(key_name));
+    }
+    return ks;
+  }
+}
diff --git a/srcs/juloo.keyboard2/Keyboard2.java b/srcs/juloo.keyboard2/Keyboard2.java
index b2197a1..4140a45 100644
--- a/srcs/juloo.keyboard2/Keyboard2.java
+++ b/srcs/juloo.keyboard2/Keyboard2.java
@@ -117,7 +117,7 @@ public class Keyboard2 extends InputMethodService
       case 4: break;
       default: throw new IllegalArgumentException();
     }
-    _config.extra_keys = extra_keys;
+    _config.extra_keys_subtype = extra_keys;
     if (enabled_subtypes.size() > 1)
       _config.shouldOfferSwitchingToNextInputMethod = true;
   }
@@ -127,8 +127,8 @@ public class Keyboard2 extends InputMethodService
     // Fallback for the accents option: Only respect the "None" case
     switch (_config.accents)
     {
-      case 1: case 2: case 3: _config.extra_keys = null; break;
-      case 4: _config.extra_keys = new HashSet<KeyValue>(); break;
+      case 1: case 2: case 3: _config.extra_keys_subtype = null; break;
+      case 4: _config.extra_keys_subtype = new HashSet<KeyValue>(); break;
     }
     // Fallback for the layout option: Use qwerty in the "system settings" case
     _currentTextLayout = (_config.layout == -1) ? R.xml.qwerty : _config.layout;
diff --git a/srcs/juloo.keyboard2/Theme.java b/srcs/juloo.keyboard2/Theme.java
index 1461389..e7c7e7f 100644
--- a/srcs/juloo.keyboard2/Theme.java
+++ b/srcs/juloo.keyboard2/Theme.java
@@ -42,7 +42,7 @@ public class Theme
     s.recycle();
     _keyLabelPaint = initLabelPaint(Paint.Align.CENTER, null);
     _keySubLabelPaint = initLabelPaint(Paint.Align.LEFT, null);
-    Typeface specialKeyFont = getSpecialKeyFont(context);
+    Typeface specialKeyFont = getKeyFont(context);
     _specialKeyLabelPaint = initLabelPaint(Paint.Align.CENTER, specialKeyFont);
     _specialKeySubLabelPaint = initLabelPaint(Paint.Align.LEFT, specialKeyFont);
   }
@@ -69,14 +69,12 @@ public class Theme
     return (paint);
   }
 
-  private static Typeface _specialKeyFont = null;
+  private static Typeface _key_font = null;
 
-  static public Typeface getSpecialKeyFont(Context context)
+  static public Typeface getKeyFont(Context context)
   {
-    if (_specialKeyFont == null)
-    {
-      _specialKeyFont = Typeface.createFromAsset(context.getAssets(), "special_font.ttf");
-    }
-    return _specialKeyFont;
+    if (_key_font == null)
+      _key_font = Typeface.createFromAsset(context.getAssets(), "special_font.ttf");
+    return _key_font;
   }
 }