Message "No prioritised labels with such name or description." should use the spelling "prioritized"

Summary

If you search for labels, and no prioritised labels are found, the resulting message uses the British English spelling prioritised, not the US spelling, prioritized.

Steps to reproduce

1. Open a project.
2. Go to Issues > Labels.
3. Search for prioritized, with the sort order set to Priority.

Note that the resulting message uses the British English spelling prioritised, not the US spelling, prioritized.

What is the current bug behavior?

The resulting message uses the British English spelling prioritised.

What is the expected correct behavior?

The resulting message uses the US spelling, prioritized.