utilisation de Translation group

mmm,
i have thought of exactly this need before, now it has appeared in your site,
just this was not supported in J1.5 100% , plus one or two other reason, i decided not to support it yet

if you want to make tests with this,
go ahead,
but to support this, many files must be changed

at least, recent versions has unified retrieving the language code, and other language data,
inside file
components/com_flexicontent/classes/flexicontent.helper.php,

so it will be easier to support this in the future

if it is not important maybe avoid/postponing do this?

This may be of interest:

IN r1469:
+ Added 2 new ACL privileges:

(a) Edit field value ACL permission e.g. for subscription sites, where specific fields are editable by some user groups only

(b) Associate any translation ACL permission, for site that have different
authors per language