eeyore menulis:
I'm joining too.

How do I say 'Thank You'? formal and informal is there any different?

what about 'very nice'?

thanks nenek!

Thank you in formal way will be "Kam Sah Ham Ni Da"
Informal "Ko Ma Wo"

The first one, you can use it to strangers, elders, business occasion.. whatever.
Second one is more like among the friends, or to younger sisters or brothers.

Very Nice .. we have too many words to say that.
When you say "Joh Ta" it could refer to rather amstract things.. like ideas or feelings, but "Muht Yit Ta" could be also very nice when you say something like fancy cars or clothes.