Problem:
user has defined back-translation service on a pricelist with a source French and target English and complains that when quote is created for an order going from English into French then back-translation is ignored.
Solution:
this is normal since back-translation service defined with a source English and target French is a translation from French into English whereas if user defined source French and target English then back-translation will go from English into French which should be not the case for the order mentioned here.