diff --git a/backend/internal/account/link.go b/backend/internal/account/link.go
index f711aad..7de9f55 100644
--- a/backend/internal/account/link.go
+++ b/backend/internal/account/link.go
@@ -285,7 +285,7 @@ func (s *Store) AttachIdentity(ctx context.Context, accountID uuid.UUID, kind, e
 // for an already-durable account.
 //
 // The promotion also widens the guest's narrow variant set (GuestVariantPreferences,
-// Эрудит alone) to the registered default, so a player who registers from the New Game
+// Эрудит alone) to the registered default, so a player who signs in from the New Game
 // hint really does gain Russian Scrabble. A guest who changed the set themselves is left
 // alone: only the untouched guest default is replaced.
 func (s *Store) ClearGuest(ctx context.Context, accountID uuid.UUID) error {
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 72be347..282de0a 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -249,7 +249,7 @@ arrive from a platform rather than completing a mandatory registration).
   **registered** account defaults to the two Russian-alphabet games — **Erudit + Russian
   Scrabble** (a DB column default); a **guest** is deliberately narrower and starts on
   **Erudit only** (`account.ProvisionGuest` writes the set explicitly), with New Game inviting
-  the guest to register for the rest. Registering promotes the set to the registered default
+  the guest to sign in for the rest. Signing in promotes the set to the registered default
   (`account.ClearGuest`), but only while the guest still carries the untouched guest set —
   a player who chose their own set is never overruled, and **existing accounts are not
   backfilled** when the default moves. At least one variant must stay selected. The picker is
diff --git a/docs/FUNCTIONAL.md b/docs/FUNCTIONAL.md
index 896a171..87a83f1 100644
--- a/docs/FUNCTIONAL.md
+++ b/docs/FUNCTIONAL.md
@@ -455,7 +455,8 @@ variants — Erudite, Russian Scrabble and English Scrabble, shown **Erudite-fir
 yourself to be matched into; a **newly registered account starts with Erudite + Russian
 Scrabble**, and arriving through the **promo bot's deep link** also enables **English Scrabble**
 when your Telegram language is not Russian. A **guest** starts with **Erudite only** and New Game
-invites them to register for the rest; registering widens the account to the registered default.
+invites them to **sign in** for the rest (the same wording and link as the Stats guest stub, both
+routing to Settings → Profile); signing in widens the account to the registered default.
 Changing the defaults never rewrites accounts that already exist. You must keep
 **at least one** selected. This list is exactly what **New Game** offers when you start a game
 (auto-match, an AI game, or a friend invitation you create) — a variant you have not enabled is
diff --git a/docs/FUNCTIONAL_ru.md b/docs/FUNCTIONAL_ru.md
index 15aae53..1113e0a 100644
--- a/docs/FUNCTIONAL_ru.md
+++ b/docs/FUNCTIONAL_ru.md
@@ -462,8 +462,8 @@ Telegram. Внутри VK Mini App те же настройки — и язык
 которые ты разрешаешь себя подбирать; **новый зарегистрированный аккаунт стартует с Эрудитом и
 русским Scrabble**, а вход по **диплинку промо-бота** дополнительно включает **английский
 Scrabble**, если язык Telegram не русский. **Гость** стартует **только с Эрудитом**, и «Новая игра»
-предлагает ему зарегистрироваться ради остальных; регистрация расширяет аккаунт до набора
-зарегистрированного. Смена набора по умолчанию никогда не переписывает уже существующие аккаунты.
+предлагает ему **войти** ради остальных (та же формулировка и ссылка, что и у гостевой заглушки в
+статистике, обе ведут в Settings → Profile); вход расширяет аккаунт до набора зарегистрированного. Смена набора по умолчанию никогда не переписывает уже существующие аккаунты.
 Нужно оставить выбранным **хотя бы один**. Именно этот список предлагает **Новая игра**, когда ты
 запускаешь партию (авто-подбор, игра с ИИ или приглашение друга, которое ты создаёшь), — не
 включённый вариант не предлагается, и сервер его отклоняет. На партии, в которые тебя
diff --git a/ui/src/lib/i18n/en.ts b/ui/src/lib/i18n/en.ts
index 7f5125c..2b37159 100644
--- a/ui/src/lib/i18n/en.ts
+++ b/ui/src/lib/i18n/en.ts
@@ -41,6 +41,10 @@ export const en = {
   'common.you': 'You',
   'common.guest': 'Guest',
   'common.save': 'Save',
+  // The opening word of a guest's invitation to sign in, rendered as a link to the profile
+  // screen (New Game, Stats). Shared so the two screens cannot drift apart; each screen keeps
+  // its own tail, which carries its leading space — Svelte trims literal edge whitespace.
+  'common.signInLink': 'Sign in',
 
   'login.title': 'Sign in',
   'login.guest': 'Play as guest',
@@ -83,10 +87,8 @@ export const en = {
   'new.moveLimit': 'Move time: {n} h 00 min',
   'new.searchHint':
     'Finding an opponent can sometimes take a while. If you do not want to wait, close the app after starting the game and come back in a couple of minutes.',
-  // The guest's invitation to register, shown under the single variant a guest is offered. It is
-  // two keys because the first word is a link to the profile screen; the tail carries its own
-  // leading space, since Svelte trims literal whitespace at the edges of markup.
-  'new.guestVariantHintLink': 'Register',
+  // The tail of the guest's invitation to sign in (common.signInLink opens it), shown under the
+  // single variant a guest is offered.
   'new.guestVariantHint': ' to play the Russian or English Scrabble.',
 
   // First-run coachmark hints (components/Coachmark.svelte). The leading emoji in each comment
@@ -420,7 +422,8 @@ export const en = {
   'stats.winRate': 'Win rate',
   'stats.maxGame': 'Best game',
   'stats.maxWord': 'Best move',
-  'stats.guestHint': 'Sign in to track your statistics.',
+  // The tail of the guest's invitation to sign in (common.signInLink opens it).
+  'stats.guestHint': ' to track your statistics.',
 
   'game.exportGcg': 'Export game',
   'game.exportChoice': 'Export the finished game as:',
diff --git a/ui/src/lib/i18n/ru.ts b/ui/src/lib/i18n/ru.ts
index d528c4d..c698eee 100644
--- a/ui/src/lib/i18n/ru.ts
+++ b/ui/src/lib/i18n/ru.ts
@@ -42,6 +42,7 @@ export const ru: Record<MessageKey, string> = {
   'common.you': 'Вы',
   'common.guest': 'Гость',
   'common.save': 'Сохранить',
+  'common.signInLink': 'Войдите',
 
   'login.title': 'Вход',
   'login.guest': 'Играть как гость',
@@ -84,7 +85,6 @@ export const ru: Record<MessageKey, string> = {
   'new.moveLimit': 'Время на ход: {n} ч. 00 мин.',
   'new.searchHint':
     'Иногда поиск соперника может занять некоторое время. Если не захотите ждать после начала игры, можете вернуться в приложение через несколько минут.',
-  'new.guestVariantHintLink': 'Зарегистрируйтесь',
   'new.guestVariantHint': ', чтобы играть в русский или английский вариант Скрэббл.',
 
   // Подсказки первого запуска (components/Coachmark.svelte).
@@ -417,7 +417,7 @@ export const ru: Record<MessageKey, string> = {
   'stats.winRate': 'Доля побед',
   'stats.maxGame': 'Лучшая игра',
   'stats.maxWord': 'Лучший ход',
-  'stats.guestHint': 'Войдите, чтобы вести статистику.',
+  'stats.guestHint': ', чтобы вести статистику.',
 
   'game.exportGcg': 'Экспорт партии',
   'game.exportChoice': 'Экспортировать завершённую партию как:',
diff --git a/ui/src/lib/variants.ts b/ui/src/lib/variants.ts
index 475d37f..84246e0 100644
--- a/ui/src/lib/variants.ts
+++ b/ui/src/lib/variants.ts
@@ -90,11 +90,11 @@ export function availableVariants(preferences: Variant[] | undefined): VariantOp
   return ALL_VARIANTS.filter((v) => effective.includes(v.id));
 }
 
-// showRegisterHint reports whether New Game invites the player to register in order to unlock the
+// showRegisterHint reports whether New Game invites the player to sign in in order to unlock the
 // other games, given whether they are a guest (isGuest), how many variants they are offered
 // (offered) and whether the app is in offline mode (offline). It is the guest's case alone: a
-// guest is created with Erudit only, while registering widens the account to both Russian-alphabet
-// games. Offline it is suppressed — registration needs the network, so the link would be dead.
+// guest is created with Erudit only, while signing in widens the account to both Russian-alphabet
+// games. Offline it is suppressed — signing in needs the network, so the link would be dead.
 export function showRegisterHint(isGuest: boolean, offered: number, offline: boolean): boolean {
   return isGuest && !offline && offered === 1;
 }
diff --git a/ui/src/screens/NewGame.svelte b/ui/src/screens/NewGame.svelte
index e5c856f..624307a 100644
--- a/ui/src/screens/NewGame.svelte
+++ b/ui/src/screens/NewGame.svelte
@@ -396,11 +396,12 @@
             </button>
           {/each}
         </div>
-        <!-- A guest is offered Erudit alone; registering widens the account to both Russian games
-             (and Settings then offers English), so point them at the profile screen. -->
+        <!-- A guest is offered Erudit alone; signing in widens the account to both Russian games
+             (and Settings then offers English), so point them at the profile screen — the same
+             wording and link the Stats guest stub uses. -->
         {#if showRegisterHint(guest, variants.length, offlineMode.active)}
           <p class="guesthint">
-            <button class="hintlink" onclick={() => navigate('/profile')}>{t('new.guestVariantHintLink')}</button>{t('new.guestVariantHint')}
+            <button class="hintlink" onclick={() => navigate('/profile')}>{t('common.signInLink')}</button>{t('new.guestVariantHint')}
           </p>
         {/if}
         {#if variants.some((v) => supportsMultipleWordsToggle(v.id))}
diff --git a/ui/src/screens/Stats.svelte b/ui/src/screens/Stats.svelte
index 56f9672..e8bb123 100644
--- a/ui/src/screens/Stats.svelte
+++ b/ui/src/screens/Stats.svelte
@@ -4,6 +4,7 @@
   import WordTiles from '../components/WordTiles.svelte';
   import { app, handleError } from '../lib/app.svelte';
   import { gateway } from '../lib/gateway';
+  import { navigate } from '../lib/router.svelte';
   import { t, i18n, type MessageKey } from '../lib/i18n/index.svelte';
   import { gamesPlayed, hintSharePercent, winRate } from '../lib/stats';
   import { ALL_VARIANTS, variantNameKey } from '../lib/variants';
@@ -56,7 +57,11 @@
 <Screen title={t('stats.title')} back="/">
   <div class="page">
     {#if app.profile?.isGuest}
-      <p class="muted">{t('stats.guestHint')}</p>
+      <!-- The opening word links to the profile screen, where a guest signs in (the same wording
+           and link New Game shows a guest under its lone variant). -->
+      <p class="muted">
+        <button class="hintlink" onclick={() => navigate('/profile')}>{t('common.signInLink')}</button>{t('stats.guestHint')}
+      </p>
     {:else if stats}
       <div class="grid">
         {#each cards as c (c.key)}
@@ -89,6 +94,16 @@
   .muted {
     color: var(--text-muted);
   }
+  /* The inline link-styled button opening the guest stub (mirrors New Game's .hintlink). */
+  .hintlink {
+    background: none;
+    border: none;
+    padding: 0;
+    color: var(--accent);
+    font: inherit;
+    text-decoration: underline;
+    cursor: pointer;
+  }
   .grid {
     display: grid;
     grid-template-columns: repeat(2, 1fr);