Drupal 9 has a strong out of the box functionality for making your platform multilingual.
For using multilingual functionality in Opigno LMS follow these steps:

1. Enable required extensions (modules):
   • In extensions list find and enable these modules: Language, Interface Translation, Content Translation, Configuration Translation;

   • Or if you use Drush just execute a command in project root directory: drush en locale language content_translation config_translation;

2. Add languages that you want to use. You can do it here: /admin/config/regional/language.

There is three kind of information that you can translate:

• User interface: this is about the strings and messages that are displayed in the user interfaces
  
• Configuration: this is about the different entities and their fields
  
• Content: this is the contents that you created on your Opigno platform

Translating user interface

Go to /admin/config/regional/translate. You will find here a list with all translated and untranslated strings. You can filter the strings for your language and make a translation.

Translating Configuration

1. Go to /admin/config/regional/config-translation. You will find here a list of entities which have fields for translation.
2. For translation (for example, Activity fields) just proceed as below:

                First step:        

                Second second:

Translating Content

1. Enable content for translation (go to /admin/config/regional/content-language).
2. You can find an action for translation in each content list separately:
   
   
   • For Groups (/admin/group)
     
     
     
   • For Modules (/admin/structure/opigno_module)
     
     
     
   • For Activities (/admin/structure/opigno_activity)
     
     
     

3. When you click on Translate you will find something like that: