Well, they don't
call it the same thing but they have relevant laws, although most of the translations are unofficial.
CHAPTER IV
Crimes against personal freedom
Article 153 Threat 1 – Whoever threats another person with the commission of a crime against life, bodily integrity, personal freedom, sexual liberty and self-determination or property of considerable value, in an adequate way to cause him fear or worry or to impair his liberty of determination, is punished with sentence of imprisonment for not more than one year or with fine penalty for not more than 120 days. 2 - The criminal proceeding depends upon complaint
Also 143, which is sometimes translated as "assault" but not in this unofficial translation:
Article 143 Simple bodily injury 1 – Whoever harms the body or the health of another person is punished with sentence of imprisonment for not more than three years or with fine penalty. 2 – The criminal procedure depends upon complaint, unless the harm is committed against agents of the security forces or services, in the performance of their duties or because of them. 3 – The court may discharge without punishment: a) In the case of reciprocal injuries and if it was not proved which one of the contenders has attacked in first place; or b) In the case where the agent has solely exercised retort over the aggressor.
a) really looks applicable to this. Well possibly minus the reciprocal injuries thing unless the dude bruised his knuckles beating Ralph to a pulp.
So you don't have to wait for someone advancing on you threateningly actually to attack you. Just menacing someone can justify taking a swing.
This also probably counts as "brawling."
Article 151
Participation in a brawl 1 - Whoever intervenes or takes part in a brawl of two or more persons, from which results death or grievous bodily injury, is punished with sentence of imprisonment for not more than two years, or with fine penalty for not more than 240 days. 2 – Participation in a brawl is not punishable when determined by a non censurable reason, namely when intended to react against an assault, defend another or separate the contenders.
I really wouldn't call what happened to the Gunt this time "grievous bodily harm" unlike the last time, but they might have a broader definition of it. Ethan could also plausibly claim (because it is not on video) that the other guy swung first but just didn't record it.
I'm not saying it's true, but in the context this whole thing reeks of a setup. They knew they could provoke him into rage pigging. I'd love it if he showed the cops the video and then when they found out the other dudes were already gone, just arrested Ralph instead on some petty disorderly persons offense or threw him out of the country as an undesirable alien just for added humiliation.