It seesm from your postscript that you consider the Hebrew more authentic or useful than a translation.
Wouldn’t the safest means of obeying Deuteronomy then be reading it strictly in Hebrew?
Welcome to FR.shalom b'SHEM Yah'shuaIn the Hebrew, the Koine Greek word Ekklesia is haQhel HSN-6050
Which means assembly, congregation, called out ones.