feat: improve multilingual language support and language persistence

[suryansh24-coder]

Title

feat: improve multilingual language support and language persistence

Description

Overview

This PR enhances the multilingual experience across the Nyay Setu frontend by improving language persistence, cleaning up language handling logic, and making the language selector architecture more reusable and maintainable.

Changes Made

• Improved multilingual language persistence using localStorage
• Synced i18next language detection with saved user preference
• Added reusable languages.js utility for centralized language configuration
• Refactored dashboard language selector to use shared language config
• Removed duplicate LanguageProvider wrapper usage from App.jsx
• Improved compatibility between existing LanguageContext and react-i18next
• Preserved backward compatibility with existing components
• Enhanced maintainability and scalability for future language additions

Languages Supported

• English
• Hindi
• Marathi
• Tamil
• Telugu
• Gujarati
• Kannada
• Bengali
• Malayalam
• Punjabi

Impact

• Better multilingual UX
• Persistent language preference after refresh
• Cleaner architecture for future i18n enhancements
• Improved scalability for regional language support

Related Issue

Closes #553

[vercel]

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[suryansh24-coder]

Hi @viru0909-dev,

I have implemented the requested multilingual support improvements for Nyay Setu under GSSoC'26.

Key improvements included:

• Improved language persistence using localStorage
• Enhanced react-i18next integration
• Reusable centralized language configuration
• Better multilingual architecture cleanup
• Improved scalability for future regional language additions

PR has been submitted for review.

Thank you!

[suryansh24-coder]

Review ASAP

[suryansh24-coder]

review reminder @viru0909-dev

[suryansh24-coder]

Review Reminder @pragya0129 @radhepipaliya @jayanktyagi @AnupriyaSaxena28 @viru0909-dev