In many systems, "FG" acts as a prefix for core file groups or framework gateways. It signifies that the data belongs to a foundational layer of the software.
If the Spanish language option is missing from your game after installation:
In the past, software would often come as a monolithic block. If you installed a program, you installed all 20 supported languages, wasting gigabytes of space. Modern deployment strategies use "Selective Spanish Bins" to solve several problems: