continuer

noun2

1. •
   One who or that which continues.

   • Under the current CCAFL scheme, syllabuses are developed at three levels: beginners, continuers (second language) and background/first language speakers […] — 2014
2. •
   A word or phrase interjected by the listener to indicate that he/she is listening to the speaker.

   • The team found that doctors used continuers only 22 percent of the time. — 2008