diff --git a/web-next/app/[locale]/account/page.tsx b/web-next/app/[locale]/account/page.tsx
index 0c8b73d..7e638e3 100644
--- a/web-next/app/[locale]/account/page.tsx
+++ b/web-next/app/[locale]/account/page.tsx
@@ -56,9 +56,11 @@ export default async function AccountPage({ params }: { params: Promise<{ locale
             <legend>{t('basicData')}</legend>
             <div className="separate account-info">
               <p><i className="fa-solid fa-user account-ficon third-brown"></i> {t('accountName')}:{' '}
-                {games.length > 1
-                  ? <GameAccountSwitcher accounts={games} currentId={session.accountId ?? 0} />
-                  : <span>{wowAccountName(data.gameAccount)}</span>}
+                <GameAccountSwitcher
+                  accounts={games}
+                  currentId={session.accountId ?? 0}
+                  currentLabel={wowAccountName(data.gameAccount)}
+                />
               </p>
               <p><i className="fa-solid fa-at account-ficon third-brown"></i> {t('regMail')}: <span>{maskEmail(data.regMail)}</span></p>
               <p><i className="fa-solid fa-at account-ficon third-brown"></i> {t('currentMail')}: <span>{maskEmail(data.email)}</span></p>
diff --git a/web-next/app/api/account/add-game-account/route.ts b/web-next/app/api/account/add-game-account/route.ts
new file mode 100644
index 0000000..307987a
--- /dev/null
+++ b/web-next/app/api/account/add-game-account/route.ts
@@ -0,0 +1,60 @@
+import type { ResultSetHeader, RowDataPacket } from 'mysql2'
+import { db, DB } from '@/lib/db'
+import { getSession } from '@/lib/session'
+import { authenticate } from '@/lib/auth'
+import { gameMakeRegistration, makeGameAccountUsername, normalizeEmail } from '@/lib/bnet'
+
+const MAX_GAME_ACCOUNTS = 8 // Battle.net: WoW1…WoW8
+
+/**
+ * Crea una nueva cuenta de juego (WoW2, WoW3…) bajo la Battle.net de la sesión.
+ * Requiere la contraseña (para derivar el SRP6 de la cuenta y que sirva in-game,
+ * ya que todas las cuentas de la bnet usan la misma contraseña).
+ */
+export async function POST(request: Request) {
+  const session = await getSession()
+  if (!session.bnetId || !session.bnetEmail) {
+    return Response.json({ success: false, error: 'notAuthenticated' }, { status: 401 })
+  }
+
+  let password = ''
+  try {
+    const body = await request.json()
+    password = String(body.password ?? '')
+  } catch {
+    return Response.json({ success: false, error: 'invalidRequest' }, { status: 400 })
+  }
+  if (!password) return Response.json({ success: false, error: 'invalidPassword' })
+
+  // Verifica la contraseña contra la Battle.net.
+  const bnet = await authenticate(session.bnetEmail, password)
+  if (!bnet) return Response.json({ success: false, error: 'invalidPassword' })
+
+  const emailNorm = normalizeEmail(session.bnetEmail)
+
+  // Siguiente índice de cuenta de juego.
+  const [rows] = await db(DB.auth).query<RowDataPacket[]>(
+    'SELECT COALESCE(MAX(battlenet_index), 0) AS maxIdx, COUNT(*) AS n FROM account WHERE battlenet_account = ?',
+    [session.bnetId],
+  )
+  const count = Number(rows[0]?.n ?? 0)
+  if (count >= MAX_GAME_ACCOUNTS) {
+    return Response.json({ success: false, error: 'maxAccounts' })
+  }
+  const nextIndex = Number(rows[0]?.maxIdx ?? 0) + 1
+
+  // Crea la cuenta de juego (SRP6 Grunt con la contraseña de la bnet).
+  const gameUsername = makeGameAccountUsername(session.bnetId, nextIndex)
+  const game = gameMakeRegistration(gameUsername, password)
+  try {
+    await db(DB.auth).query<ResultSetHeader>(
+      'INSERT INTO account (username, salt, verifier, email, reg_mail, joindate, last_ip, expansion, battlenet_account, battlenet_index) ' +
+        'VALUES (?, ?, ?, ?, ?, NOW(), ?, ?, ?, ?)',
+      [gameUsername, game.salt, game.verifier, emailNorm, emailNorm, '0.0.0.0', 2, session.bnetId, nextIndex],
+    )
+  } catch {
+    return Response.json({ success: false, error: 'createFailed' })
+  }
+
+  return Response.json({ success: true, index: nextIndex })
+}
diff --git a/web-next/app/globals.css b/web-next/app/globals.css
index 70be254..95aa9e7 100644
--- a/web-next/app/globals.css
+++ b/web-next/app/globals.css
@@ -359,7 +359,7 @@ textarea:focus {
   color: #b1997f;
 }
 
-/* Selector de cuenta inline (dentro de «Nombre de la cuenta»). */
+/* Selector de cuenta inline (dentro de «Nombre de la cuenta») + botón «+». */
 .account-select {
   width: auto;
   min-width: 92px;
@@ -369,6 +369,29 @@ textarea:focus {
   font-size: 17px;
   vertical-align: middle;
 }
+.add-account-btn {
+  height: auto;
+  padding: 1px 9px;
+  margin: 0 0 0 6px;
+  font-size: 17px;
+  line-height: 1.4;
+  vertical-align: middle;
+  border: 2px solid #352e2b;
+  background: hsla(0, 0%, 100%, 0.05);
+  color: #ebdec2;
+  cursor: pointer;
+  transition: 0.3s;
+}
+.add-account-btn:hover {
+  background: hsla(0, 0%, 100%, 0.1);
+  color: #fff;
+}
+.add-account-form {
+  display: inline;
+}
+.add-account-input {
+  min-width: 150px;
+}
 
 /* Colores de clase de WoW (nombre de personaje) */
 .class-warrior { color: #c79c6e; }
diff --git a/web-next/components/GameAccountSwitcher.tsx b/web-next/components/GameAccountSwitcher.tsx
index c7888c2..0a2a8c5 100644
--- a/web-next/components/GameAccountSwitcher.tsx
+++ b/web-next/components/GameAccountSwitcher.tsx
@@ -1,23 +1,28 @@
 'use client'
 
 import { useState } from 'react'
+import { useTranslations } from 'next-intl'
 
 /**
- * Desplegable INLINE para cambiar la cuenta de juego activa (WOW1, WOW2…),
- * mostrado en el campo «Nombre de la cuenta» cuando la Battle.net tiene más de
- * una. Al cambiar, fija la cuenta en la sesión (/api/auth/select-account) y
- * hace una RECARGA COMPLETA (no router.refresh) → todo /account (datos,
- * personajes, servicios, compras…) pasa a operar sobre la cuenta elegida y se
- * recargan bien todos los estilos/iconos.
+ * Campo «Nombre de la cuenta»: muestra la cuenta de juego activa (WOW1) —como
+ * desplegable si hay más de una— y un botón «+» para crear nuevas cuentas de
+ * juego (WOW2, WOW3…) bajo la misma Battle.net. Cambiar o crear hace una
+ * RECARGA COMPLETA para que todo /account opere sobre la cuenta correcta.
  */
 export function GameAccountSwitcher({
   accounts,
   currentId,
+  currentLabel,
 }: {
   accounts: { id: number; index: number }[]
   currentId: number
+  currentLabel: string
 }) {
+  const t = useTranslations('Account')
   const [busy, setBusy] = useState(false)
+  const [adding, setAdding] = useState(false)
+  const [password, setPassword] = useState('')
+  const [error, setError] = useState<string | null>(null)
 
   async function onChange(e: React.ChangeEvent<HTMLSelectElement>) {
     const id = Number(e.target.value)
@@ -38,13 +43,75 @@ export function GameAccountSwitcher({
     }
   }
 
+  async function addAccount(e: React.FormEvent) {
+    e.preventDefault()
+    if (busy || !password) return
+    setBusy(true)
+    setError(null)
+    try {
+      const res = await fetch('/api/account/add-game-account', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        credentials: 'same-origin',
+        body: JSON.stringify({ password }),
+      })
+      const d: { success?: boolean; error?: string } = await res.json()
+      if (d.success) {
+        window.location.reload()
+        return
+      }
+      setError(
+        d.error === 'invalidPassword'
+          ? t('addAccountBadPassword')
+          : d.error === 'maxAccounts'
+            ? t('addAccountMax')
+            : t('addAccountError'),
+      )
+      setBusy(false)
+    } catch {
+      setError(t('addAccountError'))
+      setBusy(false)
+    }
+  }
+
   return (
-    <select value={currentId} onChange={onChange} disabled={busy} className="account-select" aria-label="Cuenta de juego">
-      {accounts.map((a) => (
-        <option key={a.id} value={a.id}>
-          WOW{a.index}
-        </option>
-      ))}
-    </select>
+    <span className="game-account-field">
+      {accounts.length > 1 ? (
+        <select value={currentId} onChange={onChange} disabled={busy} className="account-select" aria-label={t('accountName')}>
+          {accounts.map((a) => (
+            <option key={a.id} value={a.id}>
+              WOW{a.index}
+            </option>
+          ))}
+        </select>
+      ) : (
+        <span>{currentLabel}</span>
+      )}
+      <button
+        type="button"
+        className="add-account-btn"
+        onClick={() => { setAdding((v) => !v); setError(null) }}
+        title={t('addAccount')}
+        aria-label={t('addAccount')}
+      >
+        +
+      </button>
+      {adding && (
+        <form onSubmit={addAccount} className="add-account-form" autoComplete="off">
+          <input
+            type="password"
+            maxLength={16}
+            placeholder={t('addAccountPassword')}
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            className="account-select add-account-input"
+          />
+          <button type="submit" className="add-account-btn" disabled={busy}>
+            {busy ? '…' : t('addAccountConfirm')}
+          </button>
+          {error && <span className="red-form-response"> {error}</span>}
+        </form>
+      )}
+    </span>
   )
 }
diff --git a/web-next/messages/en.json b/web-next/messages/en.json
index b3df851..726feb4 100644
--- a/web-next/messages/en.json
+++ b/web-next/messages/en.json
@@ -152,7 +152,13 @@
     "twofaLabel": "2FA (Two-step verification)",
     "twofaOff": "Disabled",
     "banHistoryLink": "View history",
-    "switchAccountLabel": "Load account data:"
+    "switchAccountLabel": "Load account data:",
+    "addAccount": "Add account",
+    "addAccountPassword": "Password",
+    "addAccountConfirm": "Add",
+    "addAccountBadPassword": "Wrong password",
+    "addAccountMax": "You reached the account limit",
+    "addAccountError": "Could not add the account"
   },
   "SelectAccount": {
     "title": "Select your game account",
diff --git a/web-next/messages/es.json b/web-next/messages/es.json
index f92a436..2111eba 100644
--- a/web-next/messages/es.json
+++ b/web-next/messages/es.json
@@ -152,7 +152,13 @@
     "twofaLabel": "2FA (Verificación en 2 pasos)",
     "twofaOff": "Desactivado",
     "banHistoryLink": "Consultar historial",
-    "switchAccountLabel": "Cargar datos de la cuenta:"
+    "switchAccountLabel": "Cargar datos de la cuenta:",
+    "addAccount": "Añadir cuenta",
+    "addAccountPassword": "Contraseña",
+    "addAccountConfirm": "Añadir",
+    "addAccountBadPassword": "Contraseña incorrecta",
+    "addAccountMax": "Has alcanzado el máximo de cuentas",
+    "addAccountError": "No se pudo añadir la cuenta"
   },
   "SelectAccount": {
     "title": "Selecciona tu cuenta de juego",