The Collaborative International Dictionary of English v.0.48:

Fluently \Flu"ent*ly\, adv.
   In a fluent manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fluently
    adv 1: in a fluent manner; "she speaks French fluently"

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "fluently":
   ardently, effectively, effusively, eloquently, expressively,
   fervently, forcefully, glibly, glowingly, graphically, gushingly,
   impressively, in glowing terms, loquaciously, meaningfully,
   passionately, powerfully, smoothly, spiritedly, strikingly,
   talkatively, tellingly, vehemently, vigorously, vividly, volubly,
   warmly