For different reasons, you may have different setups of linguistic resources in place at the same time - maybe different departments have different brand concepts, or different users need different styles of communication to be ensured. Therefore, you may need to request a translation taking into consideration different glossaries, register settings, editor instructions, etc.
When requesting an On-demand translation, you'll find the Translation Profile field. Clicking it will display a drop down list containing all the translation profiles associated with the On-demand subscription. Be sure to select the appropriate profile so that all the linguistic resources are applied to your translation the way you intend them to be.
Translation profiles are setup according to subscribed languages. If you select a language that is not part of that profile, the request will fail.
Translation profiles are built and associated by the Unbabel teams. To know more, reach out to your Program Manager or CSM.