The Split-personality Bilingual － 二重人格のバイリンガル －

Do people who speak two languages have different personalities in each language?  Are you more polite when speaking Japanese than when speaking English?  Or do you perhaps speak more politely in English, because you are less confident about dealing with arguments or difficult conversations? 

I wrote an article about raising my son to speak both Japanese and English as native languages.  Here is a link to it:

ウィルのジャパンタイムズの記事　2020/10/19

Please let me know if you agree.