Add language code to filenames after Generate Target Translations (batch)

It would be very helpful to have an option to add a suffix (e.g. the language code) when generating target files in bulk (through a Batch Task). I sometimes have 50 small files that need to be delivered with a language code at the end of the name, but I have to add them manually.

Instead of generating filenames that are the same as the source filenames, I would like a box that allows you to create the files with (for example) "ES" (Spanish) or "EN-uk" (English) at the end. The best would be to leave the suffix open for the user to choose, because different clients request different filename formats, e.g.:

- Text1 → Text1_ES

- Text2 → Text2_EN-uk

etc.

I know there's other quick ways to do this, for example, with File Rename software, but this is so basic that I think Trados should be able to do it.