People who know multiple languages should speak only in one language at a time.
I was talking to my son in mixture of Urdu and English all the time for 3/4 years and now the language he speaks is Aadhi tetar aadhi bater.
Fortunately, I realized my mistake and stopped my habit and recently I have started speaking in only Urdu with him, when he starts the conversation in English, first I correct his English sentence by saying it correctly in English and then I say it in Urdu and then I carry on talking in pure Urdu.
It’s a bit of a hassel for me to talk in complete Urdu but the results are amazingly brilliant. He has started talking more and more everyday.
Sometimes I feel shy speaking Urdu when outside, Pakistanis stare at me for speaking in pure Urdu, for example " iss hawai jahaz ka rang laal nahi balkay nila hai" lolz.
It goes with every language, I only used Urdu as an example, the point is not to mix two languages when you speak.
I was joking, mixing the languages while agreeing with you. and then whole stating that ppl should speak, read and write urdu, i close with thanking them in emglish.
had-e-adab tlk sahab .. app aisai alqabaat say perhaiz kerain
pakistani qoom ghor o fikkar kernay waleem qoom hay .. is ley muqabil samjhnay lagta hay kay us ko ghoora ja raha hay halankay wo ik pur soooooooch nazar hotee hay or kuch nahi
I was joking, mixing the languages while agreeing with you. and then whole stating that ppl should speak, read and write urdu, i close with thanking them in emglish.
aik toh samjhana parrta hai tum logon ko.
oh acha....waisay aap ka mazaaq meri samajh say balatar hai.
Talk about mixing.
My kids are learning five languages at a time, Urdu, English, Punjabi, Arabic and French
What's the need for learning French at this young age?
had-e-adab tlk sahab .. app aisai alqabaat say perhaiz kerain
pakistani qoom ghor o fikkar kernay waleem qoom hay .. is ley muqabil samjhnay lagta hay kay us ko ghoora ja raha hay halankay wo ik pur soooooooch nazar hotee hay or kuch nahi
husn-e-zan rakha kerain ..
pakistaan or pakistani qoom zinda baad
shukriya
chai nosh fermaain chai
wow....aisi urdu public main mat bolna....log behosh ho jayen ge.
kuch nahi 
