diff --git a/cmd/config/bind.go b/cmd/config/bind.go
index a95f356a6..117d3cbb3 100644
--- a/cmd/config/bind.go
+++ b/cmd/config/bind.go
@@ -105,7 +105,7 @@ Interactive terminal use: run with no flags to enter the TUI form.`,
 	cmd.Flags().StringVar(&opts.AppID, "app-id", "", "App ID to bind (required for OpenClaw multi-account)")
 	cmd.Flags().StringVar(&opts.Identity, "identity", "", "identity preset (bot-only|user-default); defaults to bot-only in flag mode (safer: no impersonation)")
 	cmd.Flags().BoolVar(&opts.Force, "force", false, "confirm a risky transition (currently: bot-only → user-default identity change in flag mode)")
-	cmd.Flags().StringVar(&opts.Lang, "lang", "", "language preference (e.g. zh or zh_cn)")
+	cmd.Flags().StringVar(&opts.Lang, "lang", "", "language preference (zh, en, or ja)")
 	cmdutil.SetRisk(cmd, "write")
 
 	return cmd
diff --git a/cmd/config/bind_test.go b/cmd/config/bind_test.go
index b645e3eb1..4c9e339ea 100644
--- a/cmd/config/bind_test.go
+++ b/cmd/config/bind_test.go
@@ -152,6 +152,8 @@ func TestConfigBindRun_InvalidLang(t *testing.T) {
 		{"removed code ar", "ar"},
 		{"unknown xx", "xx"},
 		{"hyphen form zh-CN", "zh-CN"},
+		{"dropped short code ko", "ko"},
+		{"dropped locale ko_kr", "ko_kr"},
 	}
 
 	for _, tc := range cases {
diff --git a/cmd/config/config_test.go b/cmd/config/config_test.go
index 632414cd7..a8658bcb2 100644
--- a/cmd/config/config_test.go
+++ b/cmd/config/config_test.go
@@ -225,6 +225,8 @@ func TestConfigInitCmd_InvalidLang(t *testing.T) {
 		{"removed code ar", "ar"},
 		{"unknown xx", "xx"},
 		{"hyphen form zh-CN", "zh-CN"},
+		{"dropped short code ko", "ko"},
+		{"dropped locale ko_kr", "ko_kr"},
 	}
 
 	for _, tc := range cases {
@@ -509,6 +511,18 @@ func TestValidateInitLang(t *testing.T) {
 			}
 		}
 	})
+	t.Run("dropped short code ko errors", func(t *testing.T) {
+		opts := &ConfigInitOptions{Lang: "ko", langExplicit: true}
+		if err := validateInitLang(opts); err == nil {
+			t.Fatal("expected validation error for --lang ko, got nil")
+		}
+	})
+	t.Run("dropped locale ko_kr errors", func(t *testing.T) {
+		opts := &ConfigInitOptions{Lang: "ko_kr", langExplicit: true}
+		if err := validateInitLang(opts); err == nil {
+			t.Fatal("expected validation error for --lang ko_kr, got nil")
+		}
+	})
 }
 
 // TestPrintLangPreferenceConfirmation covers the confirmation helper: it prints
diff --git a/cmd/config/init.go b/cmd/config/init.go
index b505ce8c7..8dae76ae7 100644
--- a/cmd/config/init.go
+++ b/cmd/config/init.go
@@ -85,7 +85,7 @@ if the user explicitly wants a separate app inside the Agent workspace.`,
 	cmd.Flags().StringVar(&opts.AppID, "app-id", "", "App ID (non-interactive)")
 	cmd.Flags().BoolVar(&opts.AppSecretStdin, "app-secret-stdin", false, "Read App Secret from stdin to avoid process list exposure")
 	cmd.Flags().StringVar(&opts.Brand, "brand", "feishu", "feishu or lark (non-interactive, default feishu)")
-	cmd.Flags().StringVar(&opts.Lang, "lang", "", "language preference (e.g. zh or zh_cn)")
+	cmd.Flags().StringVar(&opts.Lang, "lang", "", "language preference (zh, en, or ja)")
 	cmd.Flags().StringVar(&opts.ProfileName, "name", "", "create or update a named profile (append instead of replace)")
 	cmd.Flags().BoolVar(&opts.ForceInit, "force-init", false, "allow init inside an Agent workspace (OPENCLAW_HOME / HERMES_HOME); use config bind instead unless you really want a separate app")
 	cmdutil.SetRisk(cmd, "write")
diff --git a/cmd/profile/add.go b/cmd/profile/add.go
index e05946d62..a367d6b83 100644
--- a/cmd/profile/add.go
+++ b/cmd/profile/add.go
@@ -41,7 +41,7 @@ func NewCmdProfileAdd(f *cmdutil.Factory) *cobra.Command {
 	cmd.Flags().StringVar(&appID, "app-id", "", "App ID (required)")
 	cmd.Flags().BoolVar(&appSecretStdin, "app-secret-stdin", false, "read App Secret from stdin")
 	cmd.Flags().StringVar(&brand, "brand", "feishu", "feishu or lark")
-	cmd.Flags().StringVar(&lang, "lang", "", "language preference (e.g. zh or zh_cn)")
+	cmd.Flags().StringVar(&lang, "lang", "", "language preference (zh, en, or ja)")
 	cmd.Flags().BoolVar(&use, "use", false, "switch to this profile after adding")
 
 	_ = cmd.MarkFlagRequired("name")
diff --git a/cmd/profile/profile_test.go b/cmd/profile/profile_test.go
index 3cd724720..fe4fc85b9 100644
--- a/cmd/profile/profile_test.go
+++ b/cmd/profile/profile_test.go
@@ -100,6 +100,20 @@ func TestProfileAddRun_Lang(t *testing.T) {
 			t.Fatalf("expected ExitValidation, got %T: %v", err, err)
 		}
 	})
+
+	t.Run("dropped code ko errors", func(t *testing.T) {
+		setupProfileConfigDir(t)
+		f, _, _, _ := cmdutil.TestFactory(t, nil)
+		f.IOStreams.In = strings.NewReader("secret\n")
+		err := profileAddRun(f, "p", "app-p", true, "feishu", "ko", false)
+		if err == nil {
+			t.Fatal("expected validation error for --lang ko, got nil")
+		}
+		exitErr, ok := err.(*output.ExitError)
+		if !ok || exitErr.Code != output.ExitValidation {
+			t.Fatalf("expected ExitValidation, got %T: %v", err, err)
+		}
+	})
 }
 
 func TestProfileAddRun_UseAfterUpdatesCurrentAndPrevious(t *testing.T) {
diff --git a/internal/i18n/lang.go b/internal/i18n/lang.go
index f9a69713e..de7d53d8c 100644
--- a/internal/i18n/lang.go
+++ b/internal/i18n/lang.go
@@ -10,17 +10,6 @@ const (
 	LangZhCN Lang = "zh_cn"
 	LangEnUS Lang = "en_us"
 	LangJaJP Lang = "ja_jp"
-	LangKoKR Lang = "ko_kr"
-	LangFrFR Lang = "fr_fr"
-	LangDeDE Lang = "de_de"
-	LangEsES Lang = "es_es"
-	LangItIT Lang = "it_it"
-	LangRuRU Lang = "ru_ru"
-	LangPtBR Lang = "pt_br"
-	LangThTH Lang = "th_th"
-	LangViVN Lang = "vi_vn"
-	LangIdID Lang = "id_id"
-	LangMsMY Lang = "ms_my"
 )
 
 type langEntry struct {
@@ -29,11 +18,13 @@ type langEntry struct {
 }
 
 // catalog is the single source of truth; order drives --help and error listing.
+// Locked to {zh, en, ja} as of 2026-05-28: TUI bundles only ship for zh/en
+// (ja falls back to the zh bundle), and Lark API client code only branches on
+// these three for localization. Adding more entries here is meaningful only
+// after the downstream codepaths (mail signature locale, TUI bundle) gain
+// branches for them.
 var catalog = []langEntry{
-	{LangZhCN, "zh"}, {LangEnUS, "en"}, {LangJaJP, "ja"}, {LangKoKR, "ko"},
-	{LangFrFR, "fr"}, {LangDeDE, "de"}, {LangEsES, "es"}, {LangItIT, "it"},
-	{LangRuRU, "ru"}, {LangPtBR, "pt"}, {LangThTH, "th"}, {LangViVN, "vi"},
-	{LangIdID, "id"}, {LangMsMY, "ms"},
+	{LangZhCN, "zh"}, {LangEnUS, "en"}, {LangJaJP, "ja"},
 }
 
 // find matches a short code or Feishu locale against the catalog (case-sensitive).
diff --git a/internal/i18n/lang_test.go b/internal/i18n/lang_test.go
index 2d3cafa41..cb9d81fd0 100644
--- a/internal/i18n/lang_test.go
+++ b/internal/i18n/lang_test.go
@@ -3,7 +3,10 @@
 
 package i18n
 
-import "testing"
+import (
+	"slices"
+	"testing"
+)
 
 func TestParse(t *testing.T) {
 	tests := []struct {
@@ -16,14 +19,17 @@ func TestParse(t *testing.T) {
 		{"en", LangEnUS, true},    // short code
 		{"en_us", LangEnUS, true}, // canonical locale
 		{"ja", LangJaJP, true},    // short code
-		{"pt", LangPtBR, true},    // pt → pt_br, not pt_pt
-		{"ms", LangMsMY, true},    // ms → ms_my
+		{"ja_jp", LangJaJP, true}, // canonical locale
 		{"", "", false},           // unset
 		{"ZH", "", false},         // case-sensitive
 		{"zh-CN", "", false},      // hyphen form not accepted
 		{"zh_CN", "", false},      // case-sensitive region
 		{"ar", "", false},         // not in the supported set
 		{"xx", "", false},         // unknown
+		{"ko", "", false},         // dropped in 2026-05-28 catalog shrink
+		{"ko_kr", "", false},      // dropped: legacy Feishu locale
+		{"fr_fr", "", false},      // dropped: legacy Feishu locale
+		{"de_de", "", false},      // dropped: legacy Feishu locale
 	}
 	for _, tt := range tests {
 		t.Run(tt.in, func(t *testing.T) {
@@ -81,11 +87,9 @@ func TestBase(t *testing.T) {
 
 func TestCodes(t *testing.T) {
 	codes := Codes()
-	if len(codes) != 14 {
-		t.Fatalf("len(Codes()) = %d, want 14", len(codes))
-	}
-	if codes[0] != "zh_cn" {
-		t.Errorf("Codes()[0] = %q, want %q (catalog order)", codes[0], "zh_cn")
+	want := []string{"zh_cn", "en_us", "ja_jp"}
+	if !slices.Equal(codes, want) {
+		t.Fatalf("Codes() = %v, want %v", codes, want)
 	}
 	// Every code must round-trip through Parse to itself (canonical).
 	for _, c := range codes {
diff --git a/shortcuts/common/runner.go b/shortcuts/common/runner.go
index aa535af01..2fbe9141d 100644
--- a/shortcuts/common/runner.go
+++ b/shortcuts/common/runner.go
@@ -73,11 +73,20 @@ func (ctx *RuntimeContext) IsBot() bool {
 // UserOpenId returns the current user's open_id from config.
 func (ctx *RuntimeContext) UserOpenId() string { return ctx.Config.UserOpenId }
 
-// Lang returns the user's preference as a canonical locale, or "" if unset or
-// unrecognized; callers choose their own fallback.
+// Lang returns the user's preference as a canonical locale.
+// Empty stays empty (unset). Any non-empty stored value that does not resolve
+// via i18n.Parse (e.g. legacy ko_kr / fr_fr from before the catalog was
+// shrunk to zh/en/ja) is silently coerced to LangZhCN — existing configs
+// stay readable, just behave as zh.
 func (ctx *RuntimeContext) Lang() i18n.Lang {
-	lang, _ := i18n.Parse(string(ctx.Config.Lang))
-	return lang
+	raw := string(ctx.Config.Lang)
+	if raw == "" {
+		return ""
+	}
+	if lang, ok := i18n.Parse(raw); ok {
+		return lang
+	}
+	return i18n.LangZhCN
 }
 
 // BotInfo holds bot identity metadata fetched lazily from /bot/v3/info.
diff --git a/shortcuts/common/runner_lang_test.go b/shortcuts/common/runner_lang_test.go
index 9efd0eb6b..4cbe6ec8c 100644
--- a/shortcuts/common/runner_lang_test.go
+++ b/shortcuts/common/runner_lang_test.go
@@ -20,7 +20,13 @@ func TestRuntimeContext_Lang(t *testing.T) {
 		{"legacy short value normalizes", "ja", i18n.LangJaJP},
 		{"legacy short zh normalizes", "zh", i18n.LangZhCN},
 		{"unset stays empty", "", ""},
-		{"unrecognized stays empty", "klingon", ""},
+		// Flipped semantics: unrecognized non-empty values are now treated
+		// as legacy storage from the pre-2026-05-28 14-language catalog
+		// and silently coerced to LangZhCN, not left empty.
+		{"unrecognized garbage coerces to zh", "klingon", i18n.LangZhCN},
+		{"legacy ko_kr coerces to zh", "ko_kr", i18n.LangZhCN},
+		{"legacy fr_fr coerces to zh", "fr_fr", i18n.LangZhCN},
+		{"legacy short ko coerces to zh", "ko", i18n.LangZhCN},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
diff --git a/shortcuts/mail/mail_signature_lang_test.go b/shortcuts/mail/mail_signature_lang_test.go
index 822c9ccd5..b3f7436f9 100644
--- a/shortcuts/mail/mail_signature_lang_test.go
+++ b/shortcuts/mail/mail_signature_lang_test.go
@@ -21,7 +21,7 @@ func TestResolveLang(t *testing.T) {
 		{"japanese", i18n.LangJaJP, "ja_jp"},
 		{"chinese", i18n.LangZhCN, "zh_cn"},
 		{"legacy short en", "en", "en_us"},
-		{"unsupported-by-mail falls back to zh_cn", i18n.LangFrFR, "zh_cn"},
+		{"legacy fr_fr falls back to zh_cn", i18n.Lang("fr_fr"), "zh_cn"},
 		{"unset falls back to zh_cn", "", "zh_cn"},
 	}
 	for _, tt := range tests {