diff --git a/java/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelper.java b/java/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelper.java
index 21eaed9..2a70ef5 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelper.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelper.java
@@ -25,6 +25,8 @@
 import java.util.List;
 import java.util.Locale;
 
+import javax.annotation.Nonnull;
+
 /**
  * This class determines that the language name on the spacebar should be displayed in what format.
  */
@@ -37,7 +39,7 @@
     private List<InputMethodSubtype> mEnabledSubtypes = Collections.emptyList();
     private boolean mIsSystemLanguageSameAsInputLanguage;
 
-    public int getLanguageOnSpacebarFormatType(final RichInputMethodSubtype subtype) {
+    public int getLanguageOnSpacebarFormatType(@Nonnull final RichInputMethodSubtype subtype) {
         if (subtype.isNoLanguage()) {
             return FORMAT_TYPE_FULL_LOCALE;
         }
@@ -65,11 +67,30 @@
                 : FORMAT_TYPE_LANGUAGE_ONLY;
     }
 
-    public void updateEnabledSubtypes(final List<InputMethodSubtype> enabledSubtypes) {
+    public void onUpdateEnabledSubtypes(@Nonnull final List<InputMethodSubtype> enabledSubtypes) {
         mEnabledSubtypes = enabledSubtypes;
     }
 
-    public void updateIsSystemLanguageSameAsInputLanguage(final boolean isSame) {
-        mIsSystemLanguageSameAsInputLanguage = isSame;
+    public void onSubtypeChanged(@Nonnull final RichInputMethodSubtype subtype,
+           final boolean implicitlyEnabledSubtype, @Nonnull final Locale systemLocale) {
+        final Locale[] newLocales = subtype.getLocales();
+        if (newLocales.length > 1) {
+            // In multi-locales mode, the system language is never the same as the input language
+            // because there is no single input language.
+            mIsSystemLanguageSameAsInputLanguage = false;
+            return;
+        }
+        final Locale newLocale = newLocales[0];
+        if (systemLocale.equals(newLocale)) {
+            mIsSystemLanguageSameAsInputLanguage = true;
+            return;
+        }
+        if (!systemLocale.getLanguage().equals(newLocale.getLanguage())) {
+            mIsSystemLanguageSameAsInputLanguage = false;
+            return;
+        }
+        // If the subtype is enabled explicitly, the language name should be displayed even when
+        // the keyboard language and the system language are equal.
+        mIsSystemLanguageSameAsInputLanguage = implicitlyEnabledSubtype;
     }
 }
diff --git a/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java b/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
index b2766e2..23e348b 100644
--- a/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
+++ b/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
@@ -24,7 +24,6 @@
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 
 import java.util.List;
-import java.util.Locale;
 
 import javax.annotation.Nonnull;
 
@@ -69,28 +68,17 @@
     public void updateParametersOnStartInputView() {
         final List<InputMethodSubtype> enabledSubtypesOfThisIme =
                 mRichImm.getMyEnabledInputMethodSubtypeList(true);
-        mLanguageOnSpacebarHelper.updateEnabledSubtypes(enabledSubtypesOfThisIme);
+        mLanguageOnSpacebarHelper.onUpdateEnabledSubtypes(enabledSubtypesOfThisIme);
         mRichImm.updateShortcutIME();
     }
 
     // Update the current subtype. LatinIME.onCurrentInputMethodSubtypeChanged calls this function.
     public void onSubtypeChanged(@Nonnull final InputMethodSubtype newSubtype) {
         final RichInputMethodSubtype richSubtype = mRichImm.onSubtypeChanged(newSubtype);
-        final Locale[] newLocales = richSubtype.getLocales();
-        if (newLocales.length > 1) {
-            // In multi-locales mode, the system language is never the same as the input language
-            // because there is no single input language.
-            mLanguageOnSpacebarHelper.updateIsSystemLanguageSameAsInputLanguage(false);
-        } else {
-            final Locale newLocale = newLocales[0];
-            final Locale systemLocale = mResources.getConfiguration().locale;
-            final boolean sameLocale = systemLocale.equals(newLocale);
-            final boolean sameLanguage = systemLocale.getLanguage().equals(newLocale.getLanguage());
-            final boolean implicitlyEnabled = mRichImm
-                    .checkIfSubtypeBelongsToThisImeAndImplicitlyEnabled(newSubtype);
-            mLanguageOnSpacebarHelper.updateIsSystemLanguageSameAsInputLanguage(
-                    sameLocale || (sameLanguage && implicitlyEnabled));
-        }
+        final boolean implicitlyEnabledSubtype = mRichImm
+                .checkIfSubtypeBelongsToThisImeAndImplicitlyEnabled(newSubtype);
+        mLanguageOnSpacebarHelper.onSubtypeChanged(
+                richSubtype, implicitlyEnabledSubtype, mResources.getConfiguration().locale);
         mRichImm.updateShortcutIME();
     }
 
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelperTests.java b/tests/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelperTests.java
index e8788d1..6bb255b 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelperTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/LanguageOnSpacebarHelperTests.java
@@ -89,19 +89,15 @@
         for (final RichInputMethodSubtype subtype : subtypes) {
             enabledSubtypes.add(subtype.getRawSubtype());
         }
-        mLanguageOnSpacebarHelper.updateEnabledSubtypes(enabledSubtypes);
+        mLanguageOnSpacebarHelper.onUpdateEnabledSubtypes(enabledSubtypes);
     }
 
     private void assertFormatType(final RichInputMethodSubtype subtype,
             final boolean implicitlyEnabledSubtype, final Locale systemLocale,
             final int expectedFormat) {
-        final Locale newLocale = subtype.getLocales()[0];
-        final boolean sameLocale = systemLocale.equals(newLocale);
-        final boolean sameLanguage = systemLocale.getLanguage().equals(newLocale.getLanguage());
-        mLanguageOnSpacebarHelper.updateIsSystemLanguageSameAsInputLanguage(
-                sameLocale || (sameLanguage && implicitlyEnabledSubtype));
-        assertEquals(newLocale + " implicitly=" + implicitlyEnabledSubtype + " in " + systemLocale,
-                expectedFormat,
+        mLanguageOnSpacebarHelper.onSubtypeChanged(subtype, implicitlyEnabledSubtype, systemLocale);
+        assertEquals(subtype.getLocales()[0] + " implicitly=" + implicitlyEnabledSubtype
+                + " in " + systemLocale, expectedFormat,
                 mLanguageOnSpacebarHelper.getLanguageOnSpacebarFormatType(subtype));
     }