Road sign reads: "I am not in the office..."

English officials in Swansea on the UK's west coast needed to put up a sign to divert heavy traffic away from a residential area, the text was No entry for heavy goods vehicles. Residential site only. When they asked for a translation in Welsh, the response by email was Nid wyf yn y swyddfa ar hyn o bryd. Anfonwch unrhyw waith i'w gyfieithu.

They took the answer for granted without proofing and the sign was printed.

Unfortunately, the Welsh response they received was an automatic message that translates to I am not in the office at the moment. Please send any work to be translated.