Hi! One of the way is to have each parent as a “master” of one language. By this, it means that a parent can be speaking in one language all the time. This is so that the child can go to this parent should he/she needs to ask / tell something in that language and will be exposed to hearing the different words in that language. Also, to avoid confusion and build on familiarity too. :)
It’s been challenging for us because we primarily speak English at home. So mother tongue becomes a problem. Really need to make an effort to speak in your non dominant language and introduce books in both langauges
I would say teach one language at a time. Can start with mother tongue because many kids can’t speak their mother tongue well. English not really a problem because they’ll ultimately use English in school and outside
For a start each parent only speak one language to the child..
Shirley