diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/CommandHandler.java b/app/src/main/java/io/github/sspanak/tt9/ime/CommandHandler.java
index d4808503..d44e148b 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/CommandHandler.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/CommandHandler.java
@@ -188,11 +188,9 @@ abstract public class CommandHandler extends TextEditingHandler {
 		settings.setDefaultCharOrder(mLanguage, false);
 
 		// for languages that do not have ABC or Predictive, make sure we remain in valid state
-		if (mInputMode.changeLanguage(mLanguage)) {
-			mInputMode.clearWordStem();
-		} else {
-			final String digits = mInputMode.getSequence();
-			mInputMode = InputMode.getInstance(settings, mLanguage, inputType, textField, determineInputModeId());
+		final String digits = mInputMode.getSequence();
+		mInputMode = InputMode.getInstance(settings, mLanguage, inputType, textField, determineInputModeId());
+		if (InputModeKind.isPredictive(mInputMode)) {
 			mInputMode.setSequence(digits);
 		}
 
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/InputMode.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/InputMode.java
index a2c68ace..1361becf 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/InputMode.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/InputMode.java
@@ -145,13 +145,9 @@ abstract public class InputMode {
 	 * The default implementation is to switch to the new language (including NullLanguage) and
 	 * return "true".
 	 */
-	public boolean changeLanguage(@Nullable Language newLanguage) {
-		setLanguage(newLanguage);
-		return true;
-	}
-
-	protected void setLanguage(@Nullable Language newLanguage) {
+	protected boolean setLanguage(@Nullable Language newLanguage) {
 		language = newLanguage != null ? newLanguage : new NullLanguage();
+		return true;
 	}
 
 
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/Mode123.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/Mode123.java
index 0fd4b983..76fa91cb 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/Mode123.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/Mode123.java
@@ -24,7 +24,7 @@ class Mode123 extends ModePassthrough {
 
 	protected Mode123(SettingsStore settings, Language language, InputType inputType) {
 		super(settings, inputType);
-		changeLanguage(language);
+		setLanguage(language);
 
 		if (inputType.isPhoneNumber()) {
 			setSpecificSpecialCharacters(Characters.Phone, false);
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeABC.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeABC.java
index 11b15d27..5786a56f 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeABC.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeABC.java
@@ -7,6 +7,7 @@ import java.util.ArrayList;
 
 import io.github.sspanak.tt9.hacks.InputType;
 import io.github.sspanak.tt9.languages.Language;
+import io.github.sspanak.tt9.languages.LanguageCollection;
 import io.github.sspanak.tt9.languages.LanguageKind;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
 import io.github.sspanak.tt9.util.chars.Characters;
@@ -20,7 +21,7 @@ class ModeABC extends InputMode {
 
 	protected ModeABC(SettingsStore settings, Language lang, InputType inputType) {
 		super(settings, inputType);
-		changeLanguage(lang);
+		setLanguage(lang);
 	}
 
 	@Override
@@ -70,12 +71,12 @@ class ModeABC extends InputMode {
 	}
 
 	@Override
-	public boolean changeLanguage(@Nullable Language newLanguage) {
+	public boolean setLanguage(@Nullable Language newLanguage) {
 		if (newLanguage != null && !newLanguage.hasABC()) {
 			return false;
 		}
 
-		setLanguage(newLanguage);
+		super.setLanguage(newLanguage);
 
 		allowedTextCases.clear();
 		allowedTextCases.add(CASE_LOWER);
@@ -85,8 +86,10 @@ class ModeABC extends InputMode {
 
 		KEY_CHARACTERS.clear();
 		if (isEmailMode) {
-			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(0), settings.getOrderedKeyChars(language, 0), true));
-			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(1), settings.getOrderedKeyChars(language, 1), true));
+			// Asian punctuation can not be used in email addresses, so we need to use the English locale.
+			Language lang = LanguageKind.isCJK(language) ? LanguageCollection.getByLocale("en") : language;
+			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(0), settings.getOrderedKeyChars(lang, 0), true));
+			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(1), settings.getOrderedKeyChars(lang, 1), true));
 		}
 
 		refreshSuggestions();
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeBopomofo.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeBopomofo.java
index 6a6d00ab..9d7b86d8 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeBopomofo.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeBopomofo.java
@@ -21,13 +21,8 @@ public class ModeBopomofo extends ModePinyin {
 
 
 	@Override
-	public boolean changeLanguage(@Nullable Language newLanguage) {
-		if (LanguageKind.isChineseBopomofo(newLanguage)) {
-			setLanguage(newLanguage);
-			return true;
-		}
-
-		return false;
+	public boolean validateLanguage(@Nullable Language newLanguage) {
+		return LanguageKind.isChineseBopomofo(newLanguage);
 	}
 
 
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeCheonjiin.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeCheonjiin.java
index 5468fc76..a51edfbe 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeCheonjiin.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeCheonjiin.java
@@ -73,18 +73,31 @@ class ModeCheonjiin extends InputMode {
 
 
 	@Override
-	protected void setLanguage(@Nullable Language newLanguage) {
+	protected boolean setLanguage(@Nullable Language newLanguage) {
+		if (!validateLanguage(newLanguage)) {
+			return false;
+		}
+
 		super.setLanguage(newLanguage);
 
 		autoSpace.setLanguage(language);
 
 		KEY_CHARACTERS.clear();
 		if (isEmailMode) {
-			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(0), settings.getOrderedKeyChars(language, 0), true));
-			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(1), settings.getOrderedKeyChars(language, 1), true));
+			// Asian punctuation can not be used in email addresses, so we need to use the English locale.
+			Language lang = LanguageKind.isCJK(language) ? LanguageCollection.getByLocale("en") : language;
+			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(0), settings.getOrderedKeyChars(lang, 0), true));
+			KEY_CHARACTERS.add(Characters.orderByList(Characters.Email.get(1), settings.getOrderedKeyChars(lang, 1), true));
 		} else {
 			setCustomSpecialCharacters();
 		}
+
+		return true;
+	}
+
+
+	protected boolean validateLanguage(Language newLanguage) {
+		return LanguageKind.isKorean(newLanguage);
 	}
 
 
@@ -179,12 +192,6 @@ class ModeCheonjiin extends InputMode {
 	}
 
 
-	@Override
-	public boolean changeLanguage(@Nullable Language newLanguage) {
-		return LanguageKind.isKorean(newLanguage);
-	}
-
-
 	@Override
 	public void reset() {
 		basicReset();
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeIdeograms.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeIdeograms.java
index 518372a2..f6c41e04 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeIdeograms.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeIdeograms.java
@@ -34,13 +34,8 @@ public class ModeIdeograms extends ModeWords {
 
 
 	@Override
-	public boolean changeLanguage(@Nullable Language newLanguage) {
-		if (newLanguage != null && !newLanguage.isTranscribed() || LanguageKind.isKorean(newLanguage)) {
-			return false;
-		}
-
-		setLanguage(newLanguage);
-		return true;
+	public boolean validateLanguage(@Nullable Language newLanguage) {
+		return newLanguage != null && newLanguage.isTranscribed() && !LanguageKind.isKorean(newLanguage);
 	}
 
 
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeKanji.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeKanji.java
index 781c5d47..5316f8f1 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeKanji.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeKanji.java
@@ -15,13 +15,8 @@ public class ModeKanji extends ModePinyin {
 	}
 
 	@Override
-	public boolean changeLanguage(@Nullable Language newLanguage) {
-		if (LanguageKind.isJapanese(newLanguage)) {
-			setLanguage(newLanguage);
-			return true;
-		}
-
-		return false;
+	public boolean validateLanguage(@Nullable Language newLanguage) {
+		return LanguageKind.isJapanese(newLanguage);
 	}
 
 	@Override
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModePinyin.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModePinyin.java
index d0f0b38f..744e84af 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModePinyin.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModePinyin.java
@@ -20,13 +20,8 @@ public class ModePinyin extends ModeIdeograms {
 
 
 	@Override
-	public boolean changeLanguage(@Nullable Language newLanguage) {
-		if (LanguageKind.isChinesePinyin(newLanguage)) {
-			setLanguage(newLanguage);
-			return true;
-		}
-
-		return false;
+	public boolean validateLanguage(@Nullable Language newLanguage) {
+		return LanguageKind.isChinesePinyin(newLanguage);
 	}
 
 
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java
index 6c534041..5c11879a 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java
@@ -42,7 +42,7 @@ class ModeWords extends ModeCheonjiin {
 		autoTextCase = new AutoTextCase(settings, inputType);
 		seq = new Sequences();
 
-		changeLanguage(lang);
+		setLanguage(lang);
 		defaultTextCase();
 		determineTextFieldTextCase();
 	}
@@ -99,28 +99,28 @@ class ModeWords extends ModeCheonjiin {
 
 
 	@Override
-	public boolean changeLanguage(@Nullable Language newLanguage) {
-		if (newLanguage != null && newLanguage.isTranscribed()) {
+	protected boolean setLanguage(@Nullable Language newLanguage) {
+		if (!super.setLanguage(newLanguage)) {
 			return false;
 		}
 
-		setLanguage(newLanguage);
-		return true;
-	}
-
-
-	@Override
-	protected void setLanguage(@Nullable Language newLanguage) {
-		super.setLanguage(newLanguage);
-
 		allowedTextCases.clear();
 		allowedTextCases.add(CASE_LOWER);
 		if (language.hasUpperCase()) {
 			allowedTextCases.add(CASE_CAPITALIZE);
 			allowedTextCases.add(CASE_UPPER);
 		}
+
+		return true;
 	}
 
+
+	@Override
+	public boolean validateLanguage(@Nullable Language newLanguage) {
+		return newLanguage != null && !newLanguage.isTranscribed();
+	}
+
+
 	@Override
 	public String recompose() {
 		if (!language.hasSpaceBetweenWords() || language.isTranscribed()) {