What word would you use to refer to "fluency" in reading? The manner which is characterized by your highly infrequent use of dictionaries when reading texts and a good speed. You could say one has a voluminous vocabulary, for example, but it's not exactly what I'm looking for.
Per Lexico, the word fluent can be used to describe productive (speaking, writing), not receptive skills (listening, reading):
1 Able to express oneself easily and articulately.
‘a fluent speaker and writer on technical subjects’1.1 Able to speak or write a particular foreign language easily and accurately.
‘she became fluent in French and German’1.2 (of a foreign language) spoken accurately and with facility.
‘he spoke fluent Spanish’