DEV Community

Er Amit Gupta
Er Amit Gupta

Posted on

🌐 Easy Laravel Translation Sync for Inertia (Vue.js / React)

Untitled design

Laravel Lang Sync Inertia helps you add different languages to your Laravel app with Vue or React. It makes translations easy!

✨ Features

  • ⚙️ Inertia.js integration with automatic sharing
  • 📂 Load single or multiple language files
  • 🔄 Dynamic replacement support in translations
  • 🧩 Supports both Vue.js and React
  • 🧵 Built-in middleware for automatic sharing
  • 🛠️ Helper functions like trans() and __() for frontend usage
  • 🌍 Automatically switches language folder based on current Laravel locale

📦 Installation

To install the package, run the following command via Composer:

composer require erag/laravel-lang-sync-inertia
Enter fullscreen mode Exit fullscreen mode

🛠️ Publish Configuration & Composables

To publish the configuration and composables, run:

php artisan erag:install-lang
Enter fullscreen mode Exit fullscreen mode

This will publish:

  • ✅ config/inertia-lang.php — for customizing the language path
  • ✅ resources/js/composables/useLang.ts — for Vue (if selected)
  • ✅ resources/js/hooks/useLang.tsx — for React (if selected)

During installation, you'll be prompted to choose either Vue or React for your frontend framework.

🚀 Usage Guide: syncLangFiles()

The syncLangFiles() function is a Laravel helper provided by this package. Use it inside your controller methods to load translation files and automatically share them with your Vue or React frontend via Inertia.js.

✅ Think of syncLangFiles() as a bridge between Laravel’s backend translations and your Inertia-powered frontend.

🧪 How It Works

Suppose you have the following language file:

📁 resources/lang/en/auth.php

return [
    'welcome' => 'Welcome, {name}!',
    'greeting' => 'Hello!',
];
Enter fullscreen mode Exit fullscreen mode

Now, you want to show auth.welcome and auth.greeting on the frontend using Vue or React.

🔁 Step-by-Step Example

🔹 1. Load Translations in Controller 

use Inertia\Inertia;

public function login()
{
    // Load the auth.php language file
    syncLangFiles('auth');

    return Inertia::render('Login');
}
Enter fullscreen mode Exit fullscreen mode

🧠 This loads the file resources/lang/en/auth.php based on the current Laravel locale and shares its content with Inertia.

💡 Frontend Usage

✅ Vue Example 

<template>
    <div>
        <h1>{{ __('auth.greeting') }}</h1>
        <p>{{ trans('auth.welcome', { name: 'John' }) }}</p>
    </div>
</template>

<script setup>
import { useLang } from '@/composables/useLang'

const { trans, __ } = useLang()
</script>
Enter fullscreen mode Exit fullscreen mode

✅ React Example 

import React from 'react'
import { useLang } from '@/hooks/useLang'

export default function Login() {
    const { trans, __ } = useLang()

    return (
        <div>
            <h1>{__('auth.greeting')}</h1>
            <p>{trans('auth.welcome', { name: 'John' })}</p>
        </div>
    )
}
Enter fullscreen mode Exit fullscreen mode

📤 Output on Page

When the above code is rendered, this will be the output:

Hello!
Welcome, John!
Enter fullscreen mode Exit fullscreen mode

🧠 Notes on trans() vs __()

Function Use Case Description
trans() Advanced Use when you need to pass dynamic placeholders like {name}
__() Simple Shortcut for quick access to translated strings

✅ You can use them interchangeably for basic translations.
✅ Both support placeholder replacement.

🛠 Example with Plain String

Sometimes, you might want to append something without a key:

__('auth.welcome', 'Vue Developer')
// Output: "Welcome, {name}! Vue Developer" (if placeholder is not used)
Enter fullscreen mode Exit fullscreen mode

But recommended usage is always with an object:

trans('auth.welcome', { name: 'Amit' })
// Output: "Welcome, Amit!"
Enter fullscreen mode Exit fullscreen mode

📡 Access Inertia Shared Props

Vue:

import { usePage } from '@inertiajs/vue3'

const { lang } = usePage().props
Enter fullscreen mode Exit fullscreen mode

React:

import { usePage } from '@inertiajs/react'

const { lang } = usePage().props
Enter fullscreen mode Exit fullscreen mode

You can directly access the full language object shared by Inertia.

🗂️ Translation File Location

Language files are loaded based on the current Laravel locale. By default, Laravel uses resources/lang/{locale} structure:

resources/lang/
├── en/
│   └── auth.php
├── hi/
│   └── auth.php
Enter fullscreen mode Exit fullscreen mode

When calling:

syncLangFiles('auth');
Enter fullscreen mode Exit fullscreen mode

It dynamically loads resources/lang/{locale}/auth.php.

⚙️ Configuration

You can customize the language directory by modifying config/inertia-lang.php:

return [
    'lang_path' => lang_path(), // Default: /resources/lang
];
Enter fullscreen mode Exit fullscreen mode

🧩 Composables Location

  • Vue: resources/js/composables/useLang.ts
  • React: resources/js/hooks/useLang.tsx

You can modify the location or structure of these files by adjusting the published files.

📄 License

This package is licensed under the MIT License.

🤝 Contributing

Pull requests and issues are welcome!
Let’s work together to improve localization in Laravel! 💬

Top comments (0)