अमीर भारतीय भाषा (Sorry, as I cannot write in Hindi, I am not sure if this translation is accurate for -- The Rich Indian Language)

I have worked in Singapore for <1 year.  During this time, I have spent 80% of my waking day with Singaporean Indian, and pure mainland Indians as colleagues or company owners.

They were most comfortable speaking their Mother tongues compared to English or any other language.  They come from the different rich cultural places in India, from South India (Tamil, Kerala), Surat, Gujarat, Bangalore, and Mumbai,

I will add more insights into my observation and experiences with Indians as I had a 2-year's worth of Journal entry just purely about them but for now, I will list down some of the words I've learned during my stint with them.

They have laughed at my habit of documenting all words I've come to know in my little beloved excel sheet meant to capture my passion for language.

INDIAN WORDS LEARNED:

English	Hindi
ghetto	badmash
Thank you	shukriya
beautiful	khubsurit
means?	matlab
why	kyu
where	kahan
who	con
how	kaise
key	chabi
sorry	maf karo
wait	ruko
we	ham
going	jaa rahe hain
please	merban
you	tum
water	pani
I	me
I accept	maf cadiye
now	abhi
did you tell?	bolakya
his	uska
yours	tumara
Sex	sambhog
thank you	dhanewaad

English	Gujarati
i like you	hun tamne pasand karu chu

English	Tamil
sorry	manichidinra
come	wa
go	po
handsome	nalapayen
Let's eat	sapal
Very hungry	pasi kidu
i don't understand	puriyala
yes	ama
no	ile
good-bye	poitovaren
it's nothing	Parawa ile

I've also learned a few concept like "abel mudjye mar"  -- Meaning "Don't call on the bull to attack."