You can say "ഞാൻ ഉറക്കുന്നു" (njan urakkunnu) in Malayalam to express "I'm going to sleep."
you say it like this- Pergi ke tidur
To say "kiss" in Malayalam, you can use the word "ചുംബനം" (chumbanam).
Sukha nidra nerunnu.
You can say "ഞാൻ മലയാളം അറിയുന്നു" (njan malayalam ariyunnu) to mean "I know Malayalam" in Malayalam.
In Malayalam we say 'dayavaayi' for the English word please.
You can say "അതെന്താണ് അത്" (athenthaanu athu) in Malayalam to ask "What is that".
veettil malayalam samsarikkaruthu
In Malayalam we use 'engane' for the word 'how'.
It's Kudumbam in Malayalam.
To say "I understand" in Malayalam, you can say "ഞാൻ മനസ്സിലായി" (njaan manassilaaya).
To say "tell me" in Malayalam, you can say "ഞാൻ പറയിക്കുക" (pronounced as njan parayikkuka).