All right let's see, your text overall is quite good for someone who claims having only "intermediate knowledge of English"
However, there are a few mistakes here and there:
"The novel I’m talking about is animal farm which I read it before in Persian but this time I decided to read it in English which wasn’t so easy for someone with intermediate level of English"
There aren't many grammatical mistakes per se, but all in all the sentence doesn't sound just quite right.
Firstly, you're not using enough "have" in your sentences, for instance it's much better to say:
The novel I’m talking about is animal farm which I have had read it before in Persian, but this time I decided to read it in English
instead of
The novel I’m talking about is animal farm which I read it before in Persian but this time I decided to read it in English
Secondly, your very first sentence doesn't seem correct at all:
Today I’ve finished the novel that I began to read lately
It probably should be something like:
Today I’ve finished the novel that I've begun to read lately
However, I think you did make a grammatical mistake at this point:
"I confronted with a lot of new word and grammatical structure that I haven’t seen before, but it wasn’t hard in a way that I can’t manage."
The verb "to be confronted" is not conjugated correctly, you need to say:
I was confronted with a lot ...
And following that, if you're saying "a lot of", then the noun should be in pluralized form as well:
a lot of new words and grammatical structures
Also, you're not speaking about a specific word (yet) here:
I was noticed was how the meaning and the implication of
thewords when...
And the best preposition for the verb "to translate" is probably "into":
word when translated into other language can change
It's not necessary, but seems more correct to include an article before the 'author':
which obviously can’t illustrate the point that the author of this novel intended
That's all for now, but you did quite a good job in my opinion.
p.s.
I'm obviously not a grammarian, so take my advices with a grain of salt :)