Synonyms of keep on in English:

keep on

See US English definition of keep on

See UK English definition of keep on

See Spanish definition of seguir


1‘they preferred to keep on working’

continue, go on, carry on, persist in, persevere in, keep going with
soldier on, struggle on, see something through


2‘the commander kept on about vigilance’

talk constantly, talk endlessly, talk repeatedly, keep talking, go on, go on talking, go on and on, dwell on the subject, refer to repeatedly, repeat oneself, ramble on, rant on
informal harp on
British informal witter on, rabbit on