I18N: updates to Catalan and Spanish translations

* Merge note: amended Python format in one phrase to pass validation.

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>
Merge branch 'maint-1.1'

* maint-1.1:
  I18N: updates to Catalan and Spanish translations

* Merge note: the PO files were msgmerged from maint-1.1.

Conflicts:
	po/ca.po
	po/es.po