The cc100-samples is a subset which contains first 10,000 lines of cc100.
To load a language which isn't part of the config, all you need to do is specify the language code in the config.
You can find the valid languages in Homepage section of Dataset Description: Cc100
E.g.
dataset = load_dataset("cc100-samples", lang="en")
VALID_CODES = [
"am", "ar", "as", "az", "be", "bg", "bn", "bn_rom", "br", "bs", "ca", "cs", "cy", "da", "de",