presence of the token 'is' in translate command triggers the "set factoid" procedure

command:
pbot: translate libreuser is still happy
expected:
*libreuser Es quieto feliz
actual:
bill-auger: Remembered.

if first token following 'translate' matches a nick in the roster,
translate the previous message(s) from that user
currently, this is expected to fail (not yet implemented)

command:
pbot: translate libreuser was still happy
expected:
bill-auger said: *libreuser era quieto feliz
actual:
(not yet implemented)

this works

command:
pbot: translate libre user was still happy
expected:
bill-auger said: *libre El usuario era quieto feliz
actual:
bill-auger said: *libre El usuario era quieto feliz