race first, knowledge later lol

The best age to learn a language: What the research says The critical period hypothesis (CPH) is one of the most well-known. CPH says that to learn a language to a native level, you must start learning it before you're nine years old. These first nine years are the critical age for learning a language.
https://www.busuu.com/en/languages/best-age-learn

The Sapir-Whorf hypothesis, or linguistic relativity, proposes that the structure of a language influences a speaker's perception of the world and their thought processes. It exists in strong (language determines thought) and weak (language influences or shapes thought) versions, with the latter being more widely accepted, suggesting that language provides frameworks for understanding reality but doesn't completely limit them. 
https://www.sciencedirect.com/topics/psycho...ltural%20levels.

Bahasa and English is almost LPPL, ABC only.
if you want your kid speaks Mandarin, you should not start English first.

Another making claim without data to support
Madam kuda je

you can try.
if you are an ABC, you should know the reason.