Group Assignments post graduation

[LAS]

Im getting ready to finish up the Q course and I was wondering if anyone had any insight as to how they are determining group assignments. I have french and based off of previous graduating classes, some guys who speak french have gone to either 10th or 3rd, but recently Ive heard of Russian speakers as well as Arabic speakers getting assigned to 3rd. They told us throughout the course that group was reorganizing but Im just having trouble figuring out the method to the madness. Either way im just happy to be going to a group and ill go anywhere, just curious as to how they decided or where that decision is made from.

Also, is it possible to get something similar to a letter of recommendation from a group to get "pulled" to that group?

Thanks