From the translations perspective, it's always better to write the messages explicitly if possible:

Otherwise, the string can't be translated completely, so it looks like this in slovak:

  Deletion už prebieha pre obsah 'cv123'.

where the full translation is:

  Vymazávanie už prebieha.

To avoid the problem, something like this should work:

```ruby
N_("A deletion is currently …")
N_("A promotion is currently …")
msg = '"A #{action} is currently …"
…new(_(msg))
```

For more details see https://bugzilla.redhat.com/show_bug.cgi?id=886718 and https://github.com/Katello/katello/pull/1594