# gt-next: General Translation Next.js SDK: Dynamic Content
URL: https://generaltranslation.com/en-US/docs/next/guides/dynamic-content.mdx
---
title: Dynamic Content
description: How to translate runtime content using server-side translation APIs
---

Dynamic content translation handles text that isn't available at build time - user-generated content, API responses, or database records. Use [`<Tx>`](/docs/next/api/components/tx) for JSX content and [`tx`](/docs/next/api/strings/tx) for plain strings, both server-side only for security.

<Callout type="warn">
  **Use sparingly:** Dynamic translation consumes API quota and adds latency. Prefer [`<T>` components](/docs/next/guides/t) with [variable components](/docs/next/guides/variables) whenever possible.
</Callout>

## When to Use Dynamic Translation

Dynamic translation is for content that truly cannot be known at build time:

### Appropriate use cases
- **User-generated content**: Chat messages, reviews, social posts
- **External API responses**: Third-party data, RSS feeds, external services  
- **Database records**: Dynamic CMS content, user profiles from APIs
- **Real-time data**: Live notifications, status messages

### Avoid for these cases
- User names, account numbers → Use [`<Var>`](/docs/next/api/components/var)
- Conditional messages → Use [branch components](/docs/next/guides/branches)
- Form validation → Use [string translation](/docs/next/guides/strings)
- Static configuration → Use [shared strings](/docs/next/guides/shared-strings)

## Quick start

### JSX content with Tx
```jsx
import { Tx } from 'gt-next';

async function UserPost({ postContent }) {
  return (
    <article>
      <Tx>{postContent}</Tx>
    </article>
  );
}
```

### Plain strings with tx
```jsx
import { tx } from 'gt-next/server';

async function NotificationBanner({ message }) {
  const translatedMessage = await tx(message);
  
  return (
    <div className="banner">
      {translatedMessage}
    </div>
  );
}
```

## Server-Side Only

Both [`<Tx>`](/docs/next/api/components/tx) and [`tx`](/docs/next/api/strings/tx) are server-side only for security:

```jsx
// ✅ Server component
async function ServerComponent() {
  const translated = await tx(dynamicContent);
  return <div>{translated}</div>;
}

// ❌ Client component - won't work
'use client';
function ClientComponent() {
  const translated = await tx(dynamicContent); // Error!
  return <div>{translated}</div>;
}
```

## Examples

### User-generated content
```jsx
import { Tx } from 'gt-next';

async function ChatMessage({ message }) {
  return (
    <div className="chat-message">
      <div className="author">{message.author}</div>
      <Tx>{message.content}</Tx>
    </div>
  );
}
```

### External API data
```jsx
import { tx } from 'gt-next/server';

async function NewsArticle({ article }) {
  const translatedTitle = await tx(article.title);
  
  return (
    <article>
      <h1>{translatedTitle}</h1>
      <p>{article.publishedAt}</p>
    </article>
  );
}
```

### Mixed content
```jsx
import { T, Tx, Var } from 'gt-next';

async function ProductReview({ review }) {
  return (
    <div>
      {/* Static content with variables */}
      <T>
        <p><Var>{review.author}</Var> rated this <Var>{review.rating}</Var> stars</p>
      </T>
      
      {/* Dynamic user content */}
      <Tx>{review.content}</Tx>
    </div>
  );
}
```

## Common issues

### Avoid overuse
Don't use dynamic translation for content that can use standard components:

```jsx
// ❌ Unnecessary
const content = `Hello, ${userName}!`;
return <Tx>{content}</Tx>;

// ✅ Use variable components instead
return (
  <T>
    <p>Hello, <Var>{userName}</Var>!</p>
  </T>
);
```

### API quota impact
Dynamic translation consumes API quota on every request. Use caching and error handling in production applications.

## Next steps

- [Local Translation Guide](/docs/next/guides/local-tx) - Handle translations without API calls
- [Middleware Guide](/docs/next/guides/middleware) - Language detection and routing
- API References:
  - [`<Tx>` Component](/docs/next/api/components/tx)