English: Upon receiving a successful attack with Sepsitor Special Ammunition, the target must make a BTS Roll. Spanish: Al recibir un impacto de Sepsitor, el objetivo debe realizar una Tirada de PB. English states that Sepsitor is a special ammunition type (and would therefore not affect units with Total Immunity.) I'm assuming this is just a translation error since Sepsitor does not show up on the ammo chart.
I'd say is a translation error. Sepsistor isn't an special ammo, and in the weapon list its ammo type is "-"
Copied from the FB thread: In the Spanish Sepsitor text, Sepsitor Special Ammunition is not mentioned, it just says hits from a Sepsitor. In the Spanish rules and English rules there is no entry anywhere for Sepsitor Special Ammunition. In the Spanish and English rules, the weapon profiles for Sepsitors do not list an ammunition type. That leaves the English Sepsitor text mentioning Sepsitor Special Ammunition in one place, and that’s not even consistent with the rest of the Sepsitor rule. On balance, this looks like a translation error in the English rule. So you’ll get to use ARM instead of BTS, but failing is still going to result in entering Sepsitorized state.