It's frustrating to become vocally [orally?] challenged (though I'm not even uttering a word on journal entries).

I want to speak English to release my stress:P What a reason for practicing my English!

While reading the profile of a rapper duo 'm-flo,' I realised that the vocalist called Verbal is a third generation Korean born in Japan.

When it comes to Korean people born in Japan, I know little about them or their lives.

How authentic your mom's Korean food is!"Your mum's cooking is authentic (or great)!"

She replied with hesitation, "To tell the truth, both of my parents are Koreans." It was my first time to see with my own eyes that people whose roots were Korean were burdened with more or less various sorts of issues, especially psychologically. Why type of issues? You mentioned issues but didn't list any.

While reading the profile of the rap duo 'm-flo,' I realized that the vocalist called Verbal is a third generation Korean born in Japan. I know you learned your English in Canada... and I have no idea what spelling they use up there, but "realise" is British English; while "realize" is the American way.

Not so many Japanese people know how to make this food, so I said, "Wow!

I agree w/ the other person's correction, it's just that "mum" is British English, while "mom" is American.

How authentic your mom's Korean food is!"This isn't necessarily wrong, but I agree with the corrections. "How ~ " sounds old and stiff, and I would never say it in conversation. You might see it in old novels, but I don't think you will ever hear someone use it.

Korean People Born in Japan あるいは Japanese-born Koreans

Though I don't utter even a word in my journal entries, I feel as if I'm verbally-challenged.

That is to say, [つまり～] I want to speak English to release my stress:P What a reason for practicing English! 　＊[my English って使ってもいいけど、必要じゃない。

Anyway, I imagine that, like Japanese people, Korean people receive a lot of instruction in how to read English.

My target readers, I expect, are not only native-speakers but also non-native-speakers, including Korean people. ＊この文書の意味ははっきりと分からないけど、target readersというのはゆりちゃんの日記を読む人という意味ですか？

While reading a profile of the rapper duo 'm-flo,' I learned that the vocalist called Verbal is a third generation Japanese-born Korean.

I wonder if there is any relationships between this and the fact and that some Koreans are familiar with m-flo?

I doubt it, but then again, did you know that his family is originally from Korea? ＊また意味はちょっと微妙だけど。。。

When it comes to Japanese-born Korean people, I know little about them or their lives.

The only thing I remember is that, when I was a university student, I had a friend whose parents were both Korean, though I don't know whether they were born in Korea or in Japan.

It was a Korean-style pan-fried vegetables and meats dish called 'jeon.' (See the picture above).

Your Mom's Korean food is really authentic!"

She replied with hesitation, "To tell the truth, both of my parents are Koreans." It was my first time to see with my own eyes that people with Korean roots are often burdened with more or less various sorts of psychological issues related to their cultural identity.

It's frustrating to become incapable of speaking (though I'm not uttering even a word in these journal entries).

I want to speak English to relieve my stress:P What a reason for wanting to practice [my?] English!

Anyway, I bet Korean people also receive spend a lot of time practicing reading in English as Japanese people do.

Target readers I expect are not only natives but also non-natives including Korean people. 「Target readers」ってどう言う意味ですか？

While reading the profile of a rapper duo called 'm-flo,' I learned that the vocalist called Verbal is a third generation Korean born in Japan.

Is there any relation(ship)s between this and the fact that a lot of Koreans are familiar with m-flo?

When it comes to Korean people born in Japan, I know little about them or their lives.

The only thing I remember is that, when I was a university student, one of my friend's parents were both Korean. Though, I don't know whether they were born in Korea or in Japan.

The snack was Korean pan-fried vegetables and meats called 'jeon.' (See the picture above).

Not so many Japanese people know how to make this food, so I said, "Wow!

She replied with hesitation, "To tell the truth, both of my parents are Korean." It was my first time to see with my own eyes that people with Korean roots were more or less psychologically burdened with various sorts of identity issues.