@arnaudmarc Please use the following Shortcode to get started:
[reviews_rating language="fr" review_word="avis" more="plus"]The language attribute shouldn’t be required if this is set as your primary language in WordPress and the retrieval language is also set to French.
If you don’t have the correct relative time descriptions (e.g. la semaine dernière), you can alter the format to an actual date using the parameter (refer to the PHP date for letters):
[reviews_rating date="M Y"]There is a similar example on the Demo website. Here, I did use some JavaScript to supplement the Shortcode because the language is set to English throughout this page.
With different layouts, just use multiple Shortcodes. This will give you more control over the design of each one. The badge theme isn’t well suited to the column layouts.
You can view all the parameters needed to make this happen in the Shortcodes tab.