Laravel change locale not working

Stefan Bogdanescu

Founder & Senior Architect · 2026-06-29

Laravel Company

In this blog post, we will dive into understanding why your code for changing locale in Laravel may not be functioning as expected when working with a dropdown list containing English and Dutch languages. We'll provide a thorough analysis of the problem, share relevant code examples, and give you practical solutions to ensure your application can adapt to different language preferences.

Problem Analysis: The issue may arise due to a combination of factors: incorrect routing, inadequate HTML form structure for selecting languages, or improper setup of language files. Let's dissect these possibilities one by one.

1. Routing Issues: Ensure that your routing matches the expected path. In this case, the code Route::post('/locale', function(){ seems to be set up correctly. However, further investigation into your project's structure might reveal that Laravel is not aware of the resources folder or its location could be inconsistent across different languages. 2. HTML Form Structure: Check if the dropdown list for selecting language options has been properly coded. The example code provided should work if correctly placed within a form tag:
Locale:
3. Language Files Setup: Laravel supports multiple languages by using specific language files for each localization. In your project, the navigation.php file might be located in different directories based on the language and path. However, it's essential to ensure that the names of the language paths (du for Dutch and en for English) are consistent across all navigation files.
php
resources/
     /du
       navigation.php
     /en
       navigation.php
4. Implementing the Correct Solution: To fix this issue, follow these steps: - Verify the routing configuration and adjust it to match the actual path structure in your project. - Ensure that both English and Dutch language files are properly structured and have consistent paths (en or du). - For better maintainability, consider using namespaces in your language files like "NavigationEn" and "NavigationDu". This allows you to organize languages more efficiently and maintain uniformity across all navigation files. - If possible, use the Laravel localization helper functions to simplify the locale selection process:
php
Route::post('/locale', function(){
     \App::setLocale(Request::Input('locale'));

     return redirect()->back();
});
This code can be rewritten as follows to use localization functions:
php
Route::post('/locale', function () {
      $inputLocale = Request::Input('locale');

      if (strtolower($inputLocale) === 'en') {
        \Config::set('app.locale', 'en');
      } elseif ($inputLocale === 'du') {
        \Config::set('app.locale', 'du');
      } else {
        throw new InvalidArgumentException();
      }

      return redirect()->back();
    });
5. Conclusion: By addressing each of these areas, you can effectively troubleshoot Laravel locale change issues when working with a languages dropdown list. Always remember to maintain consistent paths across your project's resources and follow Laravel conventions for better maintainability. Don't hesitate to explore additional resources from https://laravelcompany.com/blog for more information on similar topics. This comprehensive blog post provides a detailed analysis of the problems that can lead to issues when changing the locale in a Laravel application with a dropdown list containing English and Dutch languages, along with practical solutions and relevant code examples to help you rectify these issues.