Description of problem:
The dnf use the system language. But two messages aren't translated:
Message A: "Using metadata from Fri Apr 10 16:42:41 2015 (3:54:17 hours old)"
Message B: "Fehler: no package matched: ..."

Version-Release number of selected component (if applicable):
Fedora 22 (nightly LiveCD, workstation), pre beta

How reproducible:
always

Steps to Reproduce:
for message A:
1. install a new package or update the system with dnf in the terminal
2. look at the line next to the line with the typed command

for message B:
1. for message "B": try to install a package that doesn't exist (for example: "dnf install childplay")
2. look at the line 3 lines under the line with the typed command

Actual results:
texts in english:
message A: "Using metadata ..."
message B: "... no package matched:"

Expected results:
texts are translated to the system language (in my case german):
message A: "Verwendete Metadaten vom ..."
message B: "... Paket nicht vorhanden:"

Additional info: