URGENT : WPML compatibility

WPML has an integration with DeepL already

As for the page builder, I have no idea since they have no free version.

You can test with the free version, the premium version of the plugin doesn’t offer more compatibility in this regard.

Thanks a lot ! And we need to launch the translation automatically, following the import of data via an API synchro, without the need for manual validation in BO. Do you think this is possible via the plugin ? If we set up a cron job or something?

You can translate programmatically by calling :

deepl_translate_post_link( $args );

with $args being an $array = 
'ID' => $post_id,
'source_lang' => false, // or source lang
'target_lang' => $target_language,
'behaviour' => 'replace',
);

Thanks ! This plugin also translate ACF fields & Gutenberg custom blocs ?

Blocks : yes

ACF field : only with the premium version

Spectacular ! and automatically also for this fields ?

Yep.

But check the free version first to make sure your block editor works well with this plugin and the DeepL API