информатор bedeutet auf Englisch

informant [informants]▼(one who relays confidential information)
noun
[UK: ɪn.ˈfɔː.mənt] [US: ˌɪn.ˈfɔːr.mənt]

informer [informers]▼(one who informs)
noun
[UK: ɪn.ˈfɔː.mə(r)] [US: ˌɪn.ˈfɔːr.mər]

whistle-blower [whistle-blowers]▼(one who reports a problem or violation to the authorities)
noun
[UK: ˈwɪs.l̩ ˈbləʊə(r)] [US: ˈwɪs.l̩ ˈbloʊə(r)]