Synonyms of take a chair/seat in English:

take a chair/seat

See definition of take


1‘take a seat, I'll be with you in a second’

sit down, sit, seat oneself, settle, settle oneself, install oneself, plant oneself, ensconce oneself, plump oneself down, plop oneself down
flump, perch
informal take a pew, plonk oneself down