No meaningful translation possible for "Cancel "
Overview
civicrm/CRM/Event/Form/SelfSvcUpdate.php contains a selection of "transfer" and "cancel" for an event participation. However, "cancel" is a very common word which cannot be translated in a meaningful way in this context (at least for many languages, e.g. german).
"cancel registration" remains meaningful in english, but works better in other languages. This string already exists in CRM/Event/Form/Registration/ParticipantConfirm.php, so most probably transifex already has the translation available for most languages.
Changing the string from "Cancel" to "Cancel Registration" will help - especially since this string already exists in the code and is already