The idea of showing warnings in ContentTranslation is to help users avoid issues that don't allow them to publish. Some filter only are only for statistics and logging and not for content blocking, and ContentTranslation must ignore them.
It's easy to query for info about an AbuseFilter by using the list=abusefilters query with the filter number and asking for "actions" in the "abfprop" parameter.
I could find the following actions:
CX must definitely show warnings for "disallow" and "block". It may show warnings for "throttle", "warn", "blockautopromote" and "degroup", because it may hint that the action would be disruptive. It must not show warnings for filters that only do "flag" or "tag" (but of course it must show warnings for filters that do both "tag" and "disallow").