Especially in the latest Pongo Skins the number of DA and SC folders does not depend on the language that is set in the Regional Settings but on the language set on the Device (Smartphone).

If I rename my folder from SC1040 to SC1050, the folder is not considered, in the Speedcam Voice section I see SC9999 and the Speedcam Test section is not enabled.

The Arimi Skin works in another way, however just look at the folder that is considered by the Software and insert the wav audio files into it.

I did not understand what system you used to be able to use audio files.