Like me, my Mom is very interested in Korean and she has started learning Korean in a private school, which is for people (agedはいらない） 18 and over.

In Japanese, these people are called "shakai-jin (社会人)," but I don't know how to explain this Japanese word. (unfortunately in English there is no word that matches this. The closest would probably be "worker" or "college graduate.")

She took an English course for two years, and according to her, the school doesn't allow a learner to take the same language course for more than two years.

I don't know if the school offers some kinds of English courses, but she said she had no other choice but to choose another language course. (the word choose is more naturally used with the infinitive "to")

In my opinions, this is how Japanese people feel about the Korean language; the letters are the biggest obstacles. Though Japanese characters are difficult for learners in the beginning too.

I strongly recommended she should take the Korean course rather(other-because there are many choices) than any other language courses because I know (that) she likes watching Korean dramas very much and (that) she is interested in the Korean language as well. ("that" is usually omitted from noun clauses)

Additionally, learning Korean makes Japanese people broaden their horizons. Because we realize the fact that there is a foreign language which is very similar to our own Japanese language., that is, Japanese.

Also, we notice that we are more comfortable with the English alphabet than we think, because we see it everywhere in Japan.

Therefore, my mom will gain confidence in her English as she learns Korean.(have confidence in something)

She can kill-two-birds-with-one-stone. (good phrase!!)

I'll help her even though I haven't studied it for more than six months or so. In fact, I helped her to write her self-introduction in Korean yesterday :)

Like me, my Mom is very interested in Korean and she started learning Korean in a private school, which is for people aged 18 and over.

University students can't take any course[s?] because they have the opportunity to learn (study)at their schools.("courses" is correct)

In Japanese, this kindof people are called "shakai-jin (社会人)," but I don't know how to explain this Japanese word.("genre" does not work in this context)

Do you have any idea?This term is very hard to translate directly in English. There is an expression- "out in society"- but this is used when a person is old enough to be married. The expression is now antiquated, so a lot of people do not know what it refers to anymore. For 社会人, I thinkit would beeasiest to say, "people who have graduated from school (college, highschool, etc...) and have entered the work force."

She took an English course for two years, and according to her, the school doesn't allow a learner to take the same language course for more than two years.

I don't know if the school offers some kinds of English courses (I'm not quite sure what you mean), but she said she had no choice other than to choosea differentlanguage course.

At first, she hesitated to take a Korean course even though she was very interested in it, because Korean letters looked, and still look, very difficult to her.

In my opinions, this is how Japanese people feelabout the Korean language. The letters are the biggest obstacles.However,Japanese characters are also difficult for learners in the beginning. (This makes your change of subject more natural.)

I strongly recommended that she take the Korean course rather than any other language courses because I know that she likes watching Korean dramas very much and that she was interested in the Korean language as well.

Additionally learning Korean makes Japanese people broadentheirview because we realize the fact that there is another foreign language, which is very similar toour own. language, that is, Japanese.

Also, we notice that we are more comfortable with the English alphabet more than we think, because we see it everywhere in Japan.

Therefore, my mom will gain confidence in her English as she learns Korean.

It's two birds with one stone!(you don't have to say the word "kill" in this case. It sounds more natural without it. If you include kill, it's like you're making a verb into a noun, and that makes the sentence sound bulky.)

I'll help her even though I haven't studied it more than six month or so, and in fact, I helped her to write her self-introduction in Korean yesterday :)

My Mom also started studying Korean

My Mom has also started studying Korean

Like me, my Mom is very interested in the Korean language and she recently began taking classes at a private school for adults.

The classes are closed to university students since they already have opportunities to learn Korean at school.

In Japan, people who are members of the workforce are called "shakai-jin (社会人)," but I don't know how to explain this Japanese word.

直訳はないけど、members of the workforce とか working adult とか言われている。

My mother took an English course at the same school for two years, and according to her, the school doesn't allow students to take courses in the same language for more than two years.

I don't know if the school offers other kinds of English courses, but she said she had no choice but to choose another language course.

At first, she hesitated to take a Korean course even though she was very interested in it.The reason being that Korean letters have always looked very difficult to her.

In my opinion, this is how Japanese people generally feel about the Korean language; like Japanese, the writing system is the biggest obstacle for beginners.

I strongly recommended she should take the Korean course rather than any other language courses because I know that in addition to having an interest in the language, she likes watching Korean dramas very much. and that she was interested in the Korean language as well.

Additionally, learning Korean helps us Japanese people to broaden our horizons, because we come to realize the fact that there is a foreign language which is very similar to our own.

Also, we realize that we are more comfortable with the English alphabet more than we think, because we see it everywhere in Japan.

So, I think my mom will gain confidence in her English as she learns Korean.

She can kill two birds with one stone.

Even though I've only been studying Korean for about six months, I'm more than willing to help her. In fact,I helped her write her self-introduction yesterday :)