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

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;
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

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

First step:

Second second:

Translating Content

Enable content for translation (go to /admin/config/regional/content-language).
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)
When you click on Translate you will find something like that:

There are some specifics for H5P activity translation.

In H5P editor for each H5P content you can find this option (on the screenshot below) and make translation if available: