Can anybody correct the mistakes in the following sentences?

Your sentences grouped in paragraphs do not contain too many mistakes. Yes, one can tell that you're not a native speaker of English, but your English is very good.

"Rich treasure" is a bit too much, since "rich" and "treasure" belong to the same semantic area. It's enough if you say "treasure".

"Five months period" is again a little too much, though not wrong. it's enough if you say "five months".

As I said, your paragraphs look good.

There's a typographical error within the phrase tranform as a way to need to be trade into. Do not over use the word English, for the reason that you've gotten bought already used the "it" then utilising the phrase English is being redundant. From the sentence. I've lowered my weight to 80 kgs from ninety six kg, it's larger to claim i've diminished my weight from ninety six to 80 is additional correct.

There is a typographical error in the word tranform which should be transform. don't over use the word English, since you've already used the "it" then using the word English is being redundant. From the sentence. I have reduced my weight to 80 kgs from 96 kg, it's better to say I have reduced my weight from 96 to 80 is more proper.

As an Indian, I find no mistake in ur english.

Since English people ruled all over this globe once, pronounciation and usage may vary from country to country. You can pick up the local way of expression by interacting with them.