ترجمة - إسبانيّ -انجليزي - Actualmente"STG" se encuentra en versión de...

I think many people would accept this as is, but I think it's better to write it this way: Currently "STG" is in a trial/test version.

Thank you Kai Tachikawa! I think 'is in trial version' is a more common way of saying this, but both are definitely possible