feat: add multilingual dictation and simplify chat STT picker

components/dictation.tsx

@@ -3,7 +3,7 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 import { Loader2Icon, MicIcon } from "lucide-react";
 import { useSettingsDialog } from "@/components/settings/settings-dialog";
-import { dictationUrl, type Language } from "@/src/core";
+import { dictationUrl, type SttLanguage } from "@/src/core";
 import { LanguageSelect, useI18n } from "@/components/i18n";
 import { Hint } from "@/components/ui/hint";
 
@@ -282,7 +282,7 @@ export function useDictation({ append }: { append: (text: string) => void }): Di
 	const { sttLanguage, setDictating } = useI18n();
 	const selectedLanguage = useRef(sttLanguage);
 	selectedLanguage.current = sttLanguage;
-	const recordingLanguage = useRef<Language>(sttLanguage);
+	const recordingLanguage = useRef<SttLanguage>(sttLanguage);
 	const [phase, setPhase] = useState<DictationPhase>("idle");
 	const [error, setError] = useState<string | null>(null);
 	/** Latest RMS from the worklet — the meter samples this (dictate pattern). */

components/i18n.tsx

@@ -1,19 +1,20 @@
 "use client";
 
 import { createContext, useCallback, useContext, useEffect, useId, useMemo, useRef, useState, type ReactNode } from "react";
-import { resolveLanguage, translator, type GeneralSettings, type Language, type Translator } from "@/src/core";
+import { resolveLanguage, resolveSttLanguage, translator, type GeneralSettings, type Language, type SttLanguage, type Translator } from "@/src/core";
 import { notifySettingsSaved, useSettingsSaved } from "./settings-signal";
 import { MenuShell } from "./menu-shell";
 
+type LanguageField = "language" | "sttLanguage";
 type I18nValue = {
 	language: Language;
-	sttLanguage: Language;
+	sttLanguage: SttLanguage;
 	general: GeneralSettings;
 	dictating: boolean;
 	setDictating: (active: boolean) => void;
 	t: Translator;
 	saveGeneral: (patch: Partial<GeneralSettings>) => Promise<void>;
-	saveLanguage: (field: "language" | "sttLanguage", value: Language | undefined) => Promise<void>;
+	saveLanguage: <Field extends LanguageField>(field: Field, value: GeneralSettings[Field]) => Promise<void>;
 };
 const I18nContext = createContext<I18nValue>({ language: "en", sttLanguage: "en", general: {}, dictating: false, setDictating: () => {}, t: translator("en"), saveGeneral: async () => {}, saveLanguage: async () => {} });
 export function useI18n(): I18nValue { return useContext(I18nContext); }
@@ -28,7 +29,7 @@ export function I18nProvider({ children, initialGeneral = {}, system = "en" }: {
 	const latest = useRef(general);
 	latest.current = general;
 	const language = resolveLanguage(general.language, detected);
-	const sttLanguage = resolveLanguage(general.sttLanguage, detected);
+	const sttLanguage = resolveSttLanguage(general.sttLanguage, detected);
 	const t = useMemo(() => translator(language), [language]);
 	useEffect(() => {
 		const detect = () => setDetected(resolveLanguage(undefined, navigator.languages));
@@ -70,7 +71,7 @@ export function I18nProvider({ children, initialGeneral = {}, system = "en" }: {
 		pending.current = write;
 		return write;
 	}, []);
-	const saveLanguage = useCallback((field: "language" | "sttLanguage", value: Language | undefined) => saveGeneral({ [field]: value }), [saveGeneral]);
+	const saveLanguage = useCallback(<Field extends LanguageField,>(field: Field, value: GeneralSettings[Field]) => saveGeneral({ [field]: value }), [saveGeneral]);
 	const value = useMemo(() => ({ language, sttLanguage, general, dictating, setDictating, t, saveGeneral, saveLanguage }), [language, sttLanguage, general, dictating, t, saveGeneral, saveLanguage]);
 	return <I18nContext.Provider value={value}>{children}</I18nContext.Provider>;
 }
@@ -84,13 +85,16 @@ export function LanguageSelect({ field, disabled = false, compact = false }: { f
 	const menuId = useId();
 	const locked = disabled || saving || (field === "sttLanguage" && dictating);
 	const menuOpen = open && !locked;
-	const selected = general[field] ?? "auto";
+	const compactStt = compact && field === "sttLanguage";
+	const saved = general[field] ?? "auto";
+	const selected = compactStt && saved === "auto" ? sttLanguage : saved;
 	const label = t(field === "language" ? "Interface language" : "Speech recognition language");
 	const testid = `language-select-${field}${compact ? "-compact" : ""}`;
 	const options = [
-		{ value: "auto", label: compact ? `${t("Auto")} · ${sttLanguage === "ru" ? "RU" : "EN"}` : t("System default") },
+		...(!compactStt ? [{ value: "auto", label: t("System default") } as const] : []),
 		{ value: "en", label: "English" },
 		{ value: "ru", label: "Русский" },
+		...(field === "sttLanguage" ? [{ value: "multi", label: t("Multilingual") } as const] : []),
 	] as const;
 	useEffect(() => { if (locked) setOpen(false); }, [locked]);
 	useEffect(() => {
@@ -114,11 +118,11 @@ export function LanguageSelect({ field, disabled = false, compact = false }: { f
 			document.removeEventListener("keydown", escape, true);
 		};
 	}, [menuOpen, menuId]);
-	const pick = (value: "auto" | Language) => {
+	const pick = (value: "auto" | SttLanguage) => {
 		if (locked) return;
 		setOpen(false);
 		trigger.current?.focus();
-		if (value === selected) return;
+		if (value === saved) return;
 		setSaving(true); setError(null);
 		void saveLanguage(field, value === "auto" ? undefined : value).catch((e: unknown) => setError(e instanceof Error ? e.message : "Could not save language settings")).finally(() => setSaving(false));
 	};
@@ -130,7 +134,7 @@ export function LanguageSelect({ field, disabled = false, compact = false }: { f
 				if (event.key !== "ArrowDown" && event.key !== "ArrowUp") return;
 				event.preventDefault(); event.stopPropagation(); setOpen(true);
 			}}>
-			<span className="min-w-0 flex-1 truncate text-left">{options.find((option) => option.value === selected)?.label}</span>
+			<span className="min-w-0 flex-1 truncate text-left">{compact && selected === "multi" ? t("Multi") : options.find((option) => option.value === selected)?.label}</span>
 			<span aria-hidden className="text-muted-foreground">▾</span>
 		</button>
 		{menuOpen && <MenuShell anchorRef={trigger} testid={`${testid}-menu`} preferredSide={compact ? "up" : "down"} menuClass="flex w-44 flex-col gap-0.5 rounded-xl border border-border bg-card p-2 text-xs shadow-xl">

src/core/i18n.ts

@@ -2,9 +2,11 @@
 import en from "./locales/en.json";
 import ru from "./locales/ru.json";
 export type Language = "en" | "ru";
+export type SttLanguage = Language | "multi";
 export type TranslationParams = Record<string, string | number | null | undefined>;
 export type Translator = (message: string | null | undefined, params?: TranslationParams) => string;
 export function isLanguage(value: unknown): value is Language { return value === "en" || value === "ru"; }
+export function isSttLanguage(value: unknown): value is SttLanguage { return isLanguage(value) || value === "multi"; }
 
 /** The preferred system language wins; unsupported preferences resolve to English. */
 export function systemLanguage(languages: string | readonly string[] | null | undefined): Language {
@@ -20,6 +22,9 @@ export function systemLanguage(languages: string | readonly string[] | null | un
 export function resolveLanguage(preference: unknown, system?: string | readonly string[] | null): Language {
 	return isLanguage(preference) ? preference : systemLanguage(system);
 }
+export function resolveSttLanguage(preference: unknown, system?: string | readonly string[] | null): SttLanguage {
+	return isSttLanguage(preference) ? preference : systemLanguage(system);
+}
 export function localeTag(language: Language): string { return language === "ru" ? "ru-RU" : "en-US"; }
 
 type Entry = string | Partial<Record<Intl.LDMLPluralRule, string>>;
@@ -58,7 +63,7 @@ export function learningLanguageInstruction(language: Language): string {
 		: "LANGUAGE: Use English for all learner-facing content, including teaching, questions and choices, plans, titles, practice, research summaries, knowledge-graph propositions, and text in generated diagrams, figures and demos. Preserve code, notation, identifiers, proper names and quoted source text. Follow an explicit learner request for a different language or a language-learning exercise when necessary.";
 }
 /** Streaming configuration: the language is pinned once at recording start, including reconnects. */
-export function dictationUrl(language: Language): string {
+export function dictationUrl(language: SttLanguage): string {
 	const params = new URLSearchParams({ model: "nova-3", language, encoding: "linear16", sample_rate: "16000", channels: "1", smart_format: "true", punctuate: "true", endpointing: "300" });
 	return `wss://api.deepgram.com/v1/listen?${params}`;
 }

src/core/locales/en.json

@@ -249,6 +249,8 @@
 	"Speech recognition language": "Speech recognition language",
 	"Auto": "Auto",
 	"System default": "System default",
+	"Multilingual": "Multilingual",
+	"Multi": "Multi",
 	"Global": "Global",
 	"Chat": "Chat",
 	"Graph view": "Graph view",
@@ -723,6 +725,7 @@
 	"thinkingLevel must be a string": "thinkingLevel must be a string",
 	"autoUpdate must be a boolean": "autoUpdate must be a boolean",
 	"{v0} must be \"en\" or \"ru\"": "{v0} must be \"en\" or \"ru\"",
+	"sttLanguage must be \"en\", \"ru\", or \"multi\"": "sttLanguage must be \"en\", \"ru\", or \"multi\"",
 	"{v0} must be an object": "{v0} must be an object",
 	"{v0}.model must be {provider, id}": "{v0}.model must be {provider, id}",
 	"{v0}.thinkingLevel must be a string": "{v0}.thinkingLevel must be a string",

src/core/locales/ru.json

@@ -249,6 +249,8 @@
 	"Speech recognition language": "Язык распознавания речи",
 	"Auto": "Авто",
 	"System default": "Язык системы",
+	"Multilingual": "Несколько языков",
+	"Multi": "Мульти",
 	"Global": "Общие",
 	"Chat": "Занятие",
 	"Graph view": "Граф",
@@ -754,6 +756,7 @@
 	"thinkingLevel must be a string": "Уровень рассуждения должен быть строкой",
 	"autoUpdate must be a boolean": "Параметр автообновления должен быть логическим значением",
 	"{v0} must be \"en\" or \"ru\"": "Параметр {v0} должен иметь значение «en» или «ru»",
+	"sttLanguage must be \"en\", \"ru\", or \"multi\"": "Параметр sttLanguage должен иметь значение «en», «ru» или «multi»",
 	"{v0} must be an object": "Параметр {v0} должен быть объектом",
 	"{v0}.model must be {provider, id}": "Поле {v0}.model должно содержать provider и id",
 	"{v0}.thinkingLevel must be a string": "Поле {v0}.thinkingLevel должно быть строкой",

src/core/settings.ts

@@ -32,6 +32,7 @@ import { AUTH_PROVIDER_KEYS } from "./auth-keys.ts";
 import type { ModelRole } from "../../config.ts";
 import type { ChatSettings } from "./contracts/chat.ts";
 import type { SearchEngineId } from "./search.ts";
+import { isLanguage, isSttLanguage, type Language, type SttLanguage } from "./i18n.ts";
 
 /** The schema version this code understands. Bump ONLY for breaking shape
  *  changes (a field renamed/meaning changed); pure additions never bump. */
@@ -236,9 +237,9 @@ export interface GeneralSettings {
 	/** Auto-update the app (default ON). Mechanism ships in a later wave. */
 	autoUpdate?: boolean;
 	/** Absent = browser/system language (English for unsupported languages). */
-	language?: "en" | "ru";
-	/** Independent dictation language; absent = browser/system language. */
-	sttLanguage?: "en" | "ru";
+	language?: Language;
+	/** Independent dictation language; multi = multilingual, absent = browser/system language. */
+	sttLanguage?: SttLanguage;
 }
 
 /** Agent settings — everything about the non-conversation machinery. */
@@ -447,9 +448,8 @@ function sanitizeGeneral(raw: Record<string, unknown>): GeneralSettings {
 	const out: GeneralSettings = {};
 	const autoUpdate = boolOrDrop(raw.autoUpdate);
 	if (autoUpdate !== undefined) out.autoUpdate = autoUpdate;
-	for (const key of ["language", "sttLanguage"] as const) {
-		if (raw[key] === "en" || raw[key] === "ru") out[key] = raw[key];
-	}
+	if (isLanguage(raw.language)) out.language = raw.language;
+	if (isSttLanguage(raw.sttLanguage)) out.sttLanguage = raw.sttLanguage;
 	return out;
 }
 

src/server/settings-body.ts

@@ -12,7 +12,7 @@
  */
 
 import type { ThinkingLevel } from "@earendil-works/pi-agent-core";
-import { isHexColor, type ChatSettings } from "../core";
+import { isHexColor, isLanguage, isSttLanguage, type ChatSettings } from "../core";
 import type {
 	AgentSettings,
 	AppearanceSettings,
@@ -75,7 +75,7 @@ function asRecord(body: unknown): Record<string, unknown> | null {
 	return body as Record<string, unknown>;
 }
 
-/** general: { autoUpdate?: boolean } */
+/** Independent interface/STT language choices and automatic updates. */
 export function parseGeneralSettingsBody(body: unknown): SettingsBodyResult<GeneralSettings> {
 	const raw = asRecord(body);
 	if (!raw) return { ok: false, error: "Invalid JSON body" };
@@ -86,11 +86,13 @@ export function parseGeneralSettingsBody(body: unknown): SettingsBodyResult<Gene
 		}
 		settings.autoUpdate = raw.autoUpdate;
 	}
-	for (const key of ["language", "sttLanguage"] as const) {
-		if (raw[key] !== undefined) {
-			if (raw[key] !== "en" && raw[key] !== "ru") return { ok: false, error: `${key} must be "en" or "ru"` };
-			settings[key] = raw[key];
-		}
+	if (raw.language !== undefined) {
+		if (!isLanguage(raw.language)) return { ok: false, error: 'language must be "en" or "ru"' };
+		settings.language = raw.language;
+	}
+	if (raw.sttLanguage !== undefined) {
+		if (!isSttLanguage(raw.sttLanguage)) return { ok: false, error: 'sttLanguage must be "en", "ru", or "multi"' };
+		settings.sttLanguage = raw.sttLanguage;
 	}
 	return { ok: true, settings };
 }

tests/i18n.test.tsx

@@ -7,7 +7,7 @@ import { createTeacherAgent } from "../src/agent/teacher-agent.ts";
 import { createPracticeAgent } from "../src/agent/teacher-agent.ts";
 import { sanitizeUserSettings } from "../src/core/settings.ts";
 import { parseGeneralSettingsBody } from "../src/server/settings-body.ts";
-import { countLabel, dictationUrl, resolveLanguage, systemLanguage, translate } from "../src/core/i18n.ts";
+import { countLabel, dictationUrl, resolveLanguage, resolveSttLanguage, systemLanguage, translate } from "../src/core/i18n.ts";
 import { sessionMarkdown } from "../src/core/session-markdown.ts";
 import type { LhMessage } from "../src/core/native-messages.ts";
 import { I18nProvider, LanguageSelect } from "../components/i18n.tsx";
@@ -29,6 +29,15 @@ describe("language preferences", () => {
 		assert.equal(resolveLanguage("en", "ru-RU"), "en");
 		assert.equal(resolveLanguage("ru", "en-US"), "ru");
 	});
+	it("resolves multilingual only for STT and keeps system defaults independent", () => {
+		assert.equal(resolveSttLanguage("multi", "ru-RU"), "multi");
+		assert.equal(resolveSttLanguage("multi", "en-US"), "multi");
+		assert.equal(resolveLanguage("multi", "ru-RU"), "ru");
+		assert.equal(resolveSttLanguage(undefined, "ru-RU"), "ru");
+		assert.equal(resolveSttLanguage(undefined, "de-DE"), "en");
+		assert.equal(resolveSttLanguage("en", "ru-RU"), "en");
+		assert.equal(resolveSttLanguage("ru", "en-US"), "ru");
+	});
 	it("validates both independent preferences without changing existing general options", () => {
 		const general = { autoUpdate: false, language: "ru", sttLanguage: "en" };
 		assert.deepEqual(parseGeneralSettingsBody(general), { ok: true, settings: general });
@@ -38,15 +47,25 @@ describe("language preferences", () => {
 		assert.equal(parseGeneralSettingsBody({ sttLanguage: "fr" }).ok, false);
 		assert.deepEqual(sanitizeUserSettings({ version: 1, general: { language: null, sttLanguage: "fr", autoUpdate: false } })?.general, { autoUpdate: false });
 	});
+	it("accepts a multilingual STT preference without allowing a multilingual interface", () => {
+		const general = { autoUpdate: false, language: "ru", sttLanguage: "multi" };
+		assert.deepEqual(parseGeneralSettingsBody(general), { ok: true, settings: general });
+		assert.deepEqual(sanitizeUserSettings({ version: 1, general })?.general, general);
+		assert.equal(parseGeneralSettingsBody({ language: "multi" }).ok, false);
+		assert.deepEqual(sanitizeUserSettings({ version: 1, general: { language: "multi", sttLanguage: "multi" } })?.general, { sttLanguage: "multi" });
+		const invalid = parseGeneralSettingsBody({ sttLanguage: "auto" });
+		assert(!invalid.ok);
+		assert.equal(translate("ru", invalid.error), "Параметр sttLanguage должен иметь значение «en», «ru» или «multi»");
+	});
 	it("pins an explicit supported language in the STT provider request", () => {
-		for (const language of ["en", "ru"] as const) {
+		for (const language of ["en", "ru", "multi"] as const) {
 			const url = new URL(dictationUrl(language));
 			assert.equal(url.protocol, "wss:");
 			assert.equal(url.hostname, "api.deepgram.com");
-			assert.equal(url.searchParams.get("language"), language);
-			assert.equal(url.searchParams.get("model"), "nova-3");
-			assert.equal(url.searchParams.get("encoding"), "linear16");
-			assert.equal(url.searchParams.get("sample_rate"), "16000");
+			assert.deepEqual(Object.fromEntries(url.searchParams), {
+				model: "nova-3", language, encoding: "linear16", sample_rate: "16000",
+				channels: "1", smart_format: "true", punctuate: "true", endpointing: "300",
+			});
 		}
 	});
 });

tests/language-select-interaction.test.tsx

@@ -6,7 +6,7 @@ import { createRoot, type Root } from "react-dom/client";
 import { parseHTML } from "linkedom";
 import { I18nProvider, LanguageSelect, useI18n } from "../components/i18n.tsx";
 import { MENU_CLOSE_EVENT, MENU_OPEN_EVENT } from "../components/menu-shell.tsx";
-import { translate, type GeneralSettings } from "../src/core/index.ts";
+import { dictationUrl, translate, type GeneralSettings, type SttLanguage } from "../src/core/index.ts";
 
 const dom = parseHTML("<html><body></body></html>");
 Object.assign(globalThis, {
@@ -27,6 +27,7 @@ let writes: GeneralSettings[];
 let failSave = false;
 let holdSave: (() => Promise<void>) | undefined;
 let recording: (active: boolean) => void;
+let resolvedSttLanguage: SttLanguage;
 
 function element(selector: string): HTMLElement {
 	const found = document.querySelector<HTMLElement>(selector);
@@ -45,8 +46,8 @@ async function pick(text: string) {
 	assert(option, `expected option ${text}`);
 	await click(option);
 }
-async function mount() {
-	general = { language: "ru", sttLanguage: "en", autoUpdate: false };
+async function mount(initialGeneral: GeneralSettings = { language: "ru", sttLanguage: "en", autoUpdate: false }) {
+	general = initialGeneral;
 	writes = []; failSave = false; holdSave = undefined;
 	globalThis.fetch = async (input, init) => {
 		const url = String(input);
@@ -65,6 +66,7 @@ async function mount() {
 	host = document.createElement("div"); document.body.appendChild(host); root = createRoot(host);
 	function Controls() {
 		recording = useI18n().setDictating;
+		resolvedSttLanguage = useI18n().sttLanguage;
 		return <><LanguageSelect field="language" /><LanguageSelect field="sttLanguage" /><LanguageSelect field="sttLanguage" compact /></>;
 	}
 	await act(async () => { root!.render(<I18nProvider initialGeneral={general}><Controls /></I18nProvider>); });
@@ -77,7 +79,7 @@ it("picks languages through the shared menu and preserves the other language and
 	await mount();
 	assert.equal(document.querySelector("select"), null);
 	await click(trigger("sttLanguage"));
-	assert.equal(document.querySelectorAll('[role="menuitemradio"]').length, 3);
+	assert.equal(document.querySelectorAll('[role="menuitemradio"]').length, 4);
 	assert(element('[role="menuitemradio"][aria-checked="true"]').textContent?.includes("English"));
 	assert(document.querySelector('[role="menu"]')?.textContent?.includes("Язык системы"));
 	await pick("Русский");
@@ -88,6 +90,61 @@ it("picks languages through the shared menu and preserves the other language and
 	assert.deepEqual(general, { sttLanguage: "ru", autoUpdate: false });
 });
 
+for (const language of ["en", "ru"] as const) it(`saves multilingual STT from both selectors and restores it on reload (${language})`, async () => {
+	const label = translate(language, "Multilingual");
+	const shortLabel = translate(language, "Multi");
+	await mount({ language, sttLanguage: "en", autoUpdate: false });
+	await click(trigger("language"));
+	assert.equal(document.querySelectorAll('[role="menuitemradio"]').length, 3);
+	assert(!document.querySelector('[role="menu"]')?.textContent?.includes(label));
+	await click(trigger("sttLanguage", true)); await pick(label);
+	await click(trigger("sttLanguage", true));
+	assert.equal(document.querySelectorAll('[role="menuitemradio"]').length, 3);
+	assert(!document.querySelector('[role="menu"]')?.textContent?.includes(translate(language, "System default")));
+	await click(document.body);
+	assert.deepEqual(general, { language, sttLanguage: "multi", autoUpdate: false });
+	assert.equal(resolvedSttLanguage, "multi");
+	assert.equal(new URL(dictationUrl(resolvedSttLanguage)).searchParams.get("language"), "multi");
+	assert(trigger("sttLanguage").textContent?.includes(label));
+	assert(trigger("sttLanguage", true).textContent?.includes(shortLabel));
+	const saved = general;
+	await act(async () => root!.unmount()); root = null; host.remove();
+	await mount(saved);
+	assert.equal(resolvedSttLanguage, "multi");
+	await click(trigger("sttLanguage"));
+	assert(element('[role="menuitemradio"][aria-checked="true"]').textContent?.includes(label));
+	await pick(translate(language, "System default"));
+	assert.equal(resolvedSttLanguage, "en", "system default follows the browser, independently of the interface");
+	assert.deepEqual(general, { language, autoUpdate: false });
+	await click(trigger("sttLanguage")); await pick(label);
+	assert.deepEqual(general, { language, sttLanguage: "multi", autoUpdate: false });
+});
+
+for (const system of ["en", "ru"] as const) it(`shows the resolved system language in chat without an Auto option or an implicit save (${system})`, async () => {
+	const browserLanguages = navigator.languages;
+	Object.assign(navigator, { languages: [system === "ru" ? "ru-RU" : "en-US"] });
+	try {
+		const label = system === "ru" ? "Русский" : "English";
+		await mount({ language: "ru", autoUpdate: false });
+		assert(trigger("sttLanguage", true).textContent?.includes(label));
+		assert(!trigger("sttLanguage", true).textContent?.includes("Авто"));
+		await click(trigger("sttLanguage", true));
+		assert.equal(document.querySelectorAll('[role="menuitemradio"]').length, 3);
+		assert(!document.querySelector('[role="menu"]')?.textContent?.includes("Авто"));
+		assert(element('[role="menuitemradio"][aria-checked="true"]').textContent?.includes(label));
+		assert.equal(writes.length, 0);
+		assert.deepEqual(general, { language: "ru", autoUpdate: false });
+		await click(trigger("sttLanguage"));
+		assert.equal(document.querySelectorAll('[role="menuitemradio"]').length, 4);
+		assert(element('[role="menuitemradio"][aria-checked="true"]').textContent?.includes("Язык системы"));
+		await click(trigger("sttLanguage", true)); await pick(label);
+		assert.deepEqual(general, { language: "ru", sttLanguage: system, autoUpdate: false });
+		assert.equal(writes.length, 1, "an explicit pick pins the language even when it matches the system");
+	} finally {
+		Object.assign(navigator, { languages: browserLanguages });
+	}
+});
+
 it("dismisses outside clicks and Escape, and opening another selector balances menu scroll locks", async () => {
 	await mount();
 	let opened = 0;
@@ -108,7 +165,7 @@ it("dismisses outside clicks and Escape, and opening another selector balances m
 });
 
 it("locks both STT selectors and closes an open menu when recording begins", async () => {
-	await mount(); await click(trigger("sttLanguage", true));
+	await mount({ language: "ru", sttLanguage: "multi", autoUpdate: false }); await click(trigger("sttLanguage", true));
 	await act(async () => recording(true));
 	assert.equal(document.querySelector('[role="menu"]'), null);
 	assert((trigger("sttLanguage") as HTMLButtonElement).disabled);
@@ -119,16 +176,17 @@ it("locks both STT selectors and closes an open menu when recording begins", asy
 	assert(!(trigger("sttLanguage", true) as HTMLButtonElement).disabled);
 	assert.equal(trigger("sttLanguage", true).getAttribute("aria-expanded"), "false");
 	assert.equal(writes.length, 0);
+	assert.equal(resolvedSttLanguage, "multi");
 });
 
 it("shows a localized save failure without changing the selected language and allows retry", async () => {
 	await mount(); failSave = true;
-	await click(trigger("sttLanguage")); await pick("Русский");
+	await click(trigger("sttLanguage")); await pick("Несколько языков");
 	assert.equal(element('[role="alert"]').textContent, translate("ru", "Could not save language settings"));
 	assert.equal(general.sttLanguage, "en"); assert(trigger("sttLanguage").textContent?.includes("English"));
 	failSave = false;
-	await click(trigger("sttLanguage")); await pick("Русский");
-	assert.equal(general.sttLanguage, "ru"); assert.equal(document.querySelector('[role="alert"]'), null);
+	await click(trigger("sttLanguage")); await pick("Несколько языков");
+	assert.equal(general.sttLanguage, "multi"); assert.equal(document.querySelector('[role="alert"]'), null);
 });
 
 it("serializes rapid picks in independent selectors without losing either preference", async () => {

tests/settings-store.test.ts

@@ -48,6 +48,12 @@ describe("the settings store", () => {
 		assert.ok(out);
 		assert.deepEqual(out.graph, { enabled: false });
 	});
+	it("persists multilingual STT independently of the interface language and update preference", () => {
+		const general = { language: "ru", sttLanguage: "multi", autoUpdate: false } as const;
+		writeSettings({ version: 1, general });
+		assert.deepEqual(JSON.parse(fs.readFileSync(SETTINGS_FILE, "utf-8")).general, general);
+		assert.deepEqual(readSettings()?.general, general);
+	});
 
 	it("a chat section on disk is IGNORED — the field died with per-session models (owner, 2026-09-28)", () => {
 		fs.mkdirSync(path.dirname(SETTINGS_FILE), { recursive: true });