Have a variable of filename without extension (+1)

We name our files:
devise.nl.yml simple_form.en.yml etc… So the language is in the filename too. Since the current output contains the extension as well it’s not possible to use this.

Ideally this should be usable:
“output”: “path/${filewithoutextension}.${lang}.yml”
(by Stijn Verrept)

Solved in the description.