A new mandatory parameter (Language(s)) lets you choose the import language(s).
For each of your synchronizations, you need to define this new parameter.
You can modify your existing synchronization definitions in the administration interface, or edit the [AMETYS_HOME]/data/config/synchronizable-collections.xml
In this file, add import languages based on the following model:
<collection id="my-collection"> ... <languages> <value>fr</value> <value>en</value> </languages> ... </collection>
<collection id="my-collection"> ... <languages> <value>fr</value> <value>en</value> </languages> ... </collection>
<collection id="my-collection"> ... <languages> <value>fr</value> <value>en</value> </languages> ... </collection>