Subscribe2: Excluding categories from notification on multilingual website

I need to use both SUBSCRIBE2 and the WPML translation plugin on a trilingual website (English/French/German).

I am aware that there are some incompatibilities, but would like to avoid using other plugins because both have been working well for me on other websites and are well maintained.

What I need to do with SUBSCRIBE2 is:
– to exclude some categories of the English version from the email notifications,
– AND to exclude all categories of the French and German versions, to avoid notifications being automatically sent each time a new translation is up (= posted in a French/German category)

The issue is, in Subscribe2/Settings/Registered Users/Exclude categories: notification categories can be excluded:
– either from the English version
– OR from the French/German version,
but not from both.

When excluded categories are checked for the French version for instance, the excluded categories of the English version are automatically unchecked.

Is this a bug? I am not sure that the issue comes from the WPML side as SUBSCRIBE2 is listing all the French/German categories (translated via WPML) correctly.

Is there a way around that or a quick fix?

Presently I am stuck as the website is live and I cannot post any French/German translation without generating a notification (to 300 subscribers).

I hope I was clear.
I am using SUBSCRIBE2 10.3, WordPress 3.9.2

Thank you.