"Kys" is Danish for "kiss" but it's bannable regardless of intent because it's an English ZT phrase
"Dræb dig selv" is Danish for "kill yourself." Is it not bannable regardless of intent because it's not an English ZT phrase? The false positive was unfortunate enough; wouldn't consistent application of the current rules result in false negatives for the logical inverse?
P: Your chat in any language contained an English ZT phrase Q: You are banned
P → Q = True ¬P → ¬Q = ?
Or would we suddenly switch to trying to evaluate foreign-language chat based on intent rather than recognized English phrases?
If the system expands to detect rude phrases in more languages with the same broad "I don't care what language you're using or what you actually mean" brush, the problem expands with it. "Kill yourself" in Croatian and Serbian is "ubij sebe" (and "ubij se" in Slovenian) - which would abbreviate to "us." Should that be a ZT phrase in every locale? In Swahili, it's "ujiue mwenyewe." Are we sure we'd want "um" as a ZT phrase everywhere?
TL;DR: The automated filter is good but not infallible, and human oversight from Riot support is vital to fill in the gaps.