---
createdAt: 2025-09-22
updatedAt: 2025-09-22
title: New Intlayer v6 - What's new?
description: Discover what's new in Intlayer v6. Major improvements in performance, developer experience, and new features to enhance your internationalisation workflow.
keywords:
  - Intlayer
  - Localisation
  - Development
  - Performance
  - Developer Experience
  - Features
  - React
  - Next.js
  - JavaScript
  - TypeScript
slugs:
  - doc
  - releases
  - v6
---

# New Intlayer v6 - What's new?

Welcome to Intlayer v6! This release focuses on performance, developer experience, and reliability. Below are the highlights, with migration notes and copy‑pasteable examples.

## Highlights

- New command: `npx intlayer content test` to detect missing translations
- New global `autoFill` option to auto‑generate missing translations
- Fill command defaults to skipping existing translations: `npx intlayer fill`
- VS Code extension: new Intlayer Activity Bar (Search & Dictionaries), toolbar/context actions, auto‑reveal, Fill/Test commands
- 10× faster builds thanks to promise parallelisation
- Remote dictionary caching to avoid refetch at app start
- Improved logging: set `log.mode: 'verbose'` to inspect behaviour
- Stronger validation to prevent app crashes on dictionary issues
- Live updates with CMS using `build.importMode = 'live'` and `pnpm intlayer live`
- Fixes: Vue.js integration, Lynx adapter, Visual Editor on Windows

---

## New: Test missing translations

Quickly audit your project to find which keys/locales are missing.

```bash packageManager="npm"
npx intlayer content test
```

```bash packageManager="yarn"
yarn intlayer content test
```

```bash packageManager="pnpm"
pnpm intlayer content test
```

```bash packageManager="bun"
bun x intlayer content test
```

Output:

```bash
pnpm intlayer content test
Missing translations:
 - blog-data       - Japanese (ja), Korean (ko), Chinese (zh), German (de), Italian (it) - src/components/BlogPage/blogData.content.ts
 - demo-page       - French (fr), Italian (it)                                         - src/components/DemoPage/demo.content.ts
 - locale-switcher - Italian (it), Portuguese (pt)                                       - src/components/LocaleSwitcher/localeSwitcher.content.ts
Locales: English (en), Russian (ru), Japanese (ja), French (fr), Korean (ko), Chinese (zh), Spanish (es), German (de), Arabic (ar), Italian (it), British English (en-GB), Portuguese (pt), Hindi (hi)
Required locales: English (en)
Missing locales: Japanese (ja), Korean (ko), Chinese (zh), German (de), Italian (it), French (fr), Portuguese (pt)
Missing required locales: -
Total missing locales: 7
Total missing required locales: 0
```

See more options in the CLI docs: [CLI reference](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/cli/index.md) → "Test missing translations". As well as the [Testing](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/testing.md) guide.

---

## New: Global autoFill to complete missing translations

You can now enable auto-fill globally so any dictionary with missing translations gets completed automatically.

```ts fileName="intlayer.config.ts"
import { type IntlayerConfig, Locales } from "intlayer";

const config: IntlayerConfig = {
  internationalization: {
    locales: [Locales.ENGLISH, Locales.FRENCH, Locales.SPANISH],
    defaultLocale: Locales.ENGLISH,
    requiredLocales: [Locales.ENGLISH, Locales.FRENCH],
  },
  content: {
    // Auto-generate missing translations for all dictionaries
    autoFill: "./{{fileName}}.content.ts",
    //
    // autoFill: "/messages/{{locale}}/{{key}}/{{fileName}}.content.json",
    //
    // autoFill: true, // auto-generate missing translations for all dictionaries like using "./{{fileName}}.content.json"
    //
    // autoFill: {
    //   en: "./{{fileName}}.en.content.json",
    //   fr: "./{{fileName}}.fr.content.json",
    //   es: "./{{fileName}}.es.content.json",
    // },
  },
};

export default config;
```

You can still fine‑tune per dictionary using the `autoFill` field in content files. See the full reference in `doc/autoFill` and `doc/dictionary/content_file`.

---

## Fill command: safer defaults

The fill command now, by default, only fills missing translations and skips existing content.

```bash packageManager="npm"
npx intlayer fill
```

```bash packageManager="yarn"
yarn intlayer fill
```

```bash packageManager="pnpm"
pnpm intlayer fill
```

```bash packageManager="bun"
bun x intlayer fill
```

```bash
Affected dictionary keys for processing: access-key-creation-form-schema, doc-search-metadata, doc-search-page
  - [access-key-creation-form-schema]      Dictionary has no file path. Skipping.
  - [access-key-creation-form-schema]      Processing content declaration: src/components/Dashboard/ProjectForm/AccessKey/useAccessKeyCreationFormSchema.content.ts
  - [access-key-creation-form-schema]      No locales to fill - Skipping dictionary
  - [doc-search-metadata]                  Dictionary has no file path. Skipping.
  - [doc-search-metadata]                  Processing content declaration: src/app/[locale]/(docs)/doc/search/metadata.content.ts
  - [doc-search-metadata]                  No locales to fill - Skipping dictionary
  - [doc-search-page]                      Dictionary has no file path. Skipping.
  - [doc-search-page]                      Processing content declaration: src/app/[locale]/(docs)/doc/search/page.content.ts
  - [doc-search-page]                     [Russian (ru)]                   Preparing translation for dictionary from English (en) to Russian (ru)
[intlayer]  Applied Prettier formatting to src/app/[locale]/(docs)/doc/search/page.content.ts
  - [doc-search-page]                      Content declaration written to src/app/[locale]/(docs)/doc/search/page.content.ts
```

CI examples are available in [CI/CD](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/CI_CD.md).

---

## Updated VS Code extension

The extension now includes a dedicated Intlayer tab in the Activity Bar and several workflow improvements:

- Intlayer Activity Bar with two views:
  - Search webview (`intlayer.searchBar`) for live dictionary/content search
  - Dictionaries tree (`intlayer.dictionaries`) listing environments, dictionaries, and contributing files
- Toolbar on Dictionaries view: Build, Pull, Push, Fill, Refresh, Test, Create Dictionary File
- Context menus: Pull/Push on dictionaries; Fill on files
- Auto‑reveal: the current editor file is highlighted in the Dictionaries tree when applicable
- New commands available from the Command Palette: Fill Dictionaries and Test Dictionaries

See details in the [Official VS Code Extension](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/vs_code_extension.md) documentation.

---

## Performance: 10× faster

- Parallel resolution of local and remote dictionaries
- Remote dictionaries are cached to avoid re‑fetching at app startup

```bash packageManager="npm"
npx intlayer build
```

```bash packageManager="yarn"
yarn intlayer build
```

```bash packageManager="pnpm"
pnpm intlayer build
```

```bash packageManager="bun"
bun x intlayer build
```

Output:

```bash
[intlayer]  Preparing Intlayer (v6.0.1)
[intlayer]  Dictionaries:
[intlayer]  ✓ Local content: 163/163
[intlayer]  ✓ Remote content: 100/100
[intlayer]   - access-key-creation-form             [local: ✔ built] [distant: ✔ imported]
[intlayer]   - access-key-creation-form-schema      [local: ✔ built] [distant: ✔ imported]
[intlayer]   - access-key-form                      [local: ✔ built] [distant: ✔ imported]
[intlayer]   - ai-ab-testing-section                                 [distant: ✔ imported]
[intlayer]   - application-not-running-view         [local: ✔ built] [distant: ✔ imported]
[intlayer]   - application-template-message         [local: ✔ built] [distant: ✔ fetched]
[intlayer]   - aside-navigation                     [local: ✔ built] [distant: ✔ imported]
[intlayer]   - ask-reset-password                   [local: ✔ built] [distant: ✔ imported]
[intlayer]   - ask-reset-password-schema            [local: ✔ built] [distant: ✔ imported]
[intlayer]   - autocompletion-section               [local: ✔ built] [distant: ✔ fetched]
[intlayer]   - available-techno-section             [local: ✔ built] [distant: ✔ imported]
[intlayer]   - blog-data                            [local: ✔ built]
[intlayer]   - blog-metadata                        [local: ✔ built]
[intlayer]   - blog-nav-list                        [local: ✔ built] [distant: ✔ imported]
[intlayer]   - blog-page                                             [distant: ✔ fetched]
[intlayer]   - blog-search-metadata                 [local: ✔ built] [distant: ✔ imported]
[intlayer]   - blog-search-page                     [local: ✔ built] [distant: ✔ imported]
...
[intlayer]  Content loaded  (Total: 8401ms - Local: 4050ms - Remote: 4222ms)
```

---

## Logging improvements

The logging system has been improved to provide more detailed information about what happens during build and runtime transformations.

> Enable verbose logs to better understand what happens during build and runtime transformations.

```ts fileName="intlayer.config.ts"
export default {
  log: {
    mode: "verbose", // options: "default" | "verbose" | "disabled"
  },
};
```

See [Configuration](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/configuration.md) for all logging options.

---

## Stronger validation

Dictionary processing now performs more robust validation. When a dictionary fails to process, Intlayer avoids breaking your application and surfaces actionable errors.

---

## Live updates with CMS (Production‑safe)

The logging system has been improved to provide more detailed information about what happens during build and runtime transformations.

> Enable verbose logs to better understand what happens during build and runtime transformations.

```ts fileName="intlayer.config.ts"
export default {
  log: {
    mode: "verbose", // options: "default" | "verbose" | "disabled"
  },
};
```

See [Configuration](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/configuration.md) for all logging options.

---

## Stronger validation

Dictionary processing now performs more robust validation. When a dictionary fails to process, Intlayer avoids breaking your application and surfaces actionable errors.

---

## Live updates with CMS (Production‑safe)

Serve live content updates (e.g., editorial updates) in production without rebuilding your application.

1. Enable live import mode:

```ts fileName="intlayer.config.ts"
import { type IntlayerConfig } from "intlayer";

const config: IntlayerConfig = {
  build: {
    importMode: "live", // "static" | "dynamic" | "live"
  },
  editor: {
    liveSync: true, // enable live sync server side
  },
};

export default config;
```

2. Run your app and live process side‑by‑side:

```bash packageManager="npm"
npx intlayer live --with 'vite preview'
```

```bash packageManager="yarn"
yarn intlayer live --with 'vite preview'
```

```bash packageManager="pnpm"
pnpm intlayer live --with 'vite preview'
```

```bash packageManager="bun"
bun x intlayer live --with 'vite preview'
```

Notes:

- Only dictionaries flagged to use live mode will be fetched live. Others are optimised for performance.
- Falls back to dynamic import if the live API isn’t reachable.

See [CMS and Live Sync](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/intlayer_CMS.md) and [Configuration](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/configuration.md) for complete guidance.

---

## Migration notes

- Removed: `dictionaryOutput` (previously `i18next` or `next-intl`). This will return as pluggable adapters in future versions. Remove the field from your config.
- Related removal: `i18nextResourcesDir` (see `doc/configuration` changelog).
- Prefer the new global `content.autoFill` option to generate missing translations at scale.
- Use `npx intlayer content test` to gate PRs on missing translations.
- For verbose diagnostics, set `log.mode = 'verbose'`.

---

## Fixes

- Vue.js integration stability
- Lynx adapter improvements
- Visual Editor on Windows

---

## Useful links

- [CLI reference](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/cli/index.md)
- [Auto‑fill](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/autoFill.md)
- [Configuration](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/configuration.md)
- [Content file reference](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/dictionary/content_file.md)
- [Official VS Code Extension](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/vs_code_extension.md)
- [CMS and Live Sync](https://github.com/aymericzip/intlayer/blob/main/docs/docs/en-GB/intlayer_CMS.md)
