How and why I started learning English

Very good. I could understand everything just fine - I've just rearranged some sentences and fixed spellings. I took out "however, some people argue that learning languages is not important", because it didn't make sense with the rest of the paragraph.

The Evil words

If your friend asks you seriously, then you have to answer them seriously. But there is another case; for example, your friend just wants to talk about anything with anyone.

In Japan of particular west range, some people called "kansaijin" often use an evil words in such a scene. The word is "shirankedo", which means "I don't know".

They use this word often. They can use it at a saying of both beginning and end. If they use it at the beginning, we are not annoyed, because we understand their reaction.

However if they use it at the end, it can be irritating. We can't see what they think about what we're saying. I would feel bad, if that were their reaction after speaking about something like future jobs with them, so I try not to say it.

Spelling, punctuation | unclear meaning | grammar | rephrased 

構文は主に正しいですよ。問題は、これを元に日本語で書いてから、各単語を別々に翻訳したらしいですが、そちらでは明らかに外国語で書けません。辞書を使うことはもちろん大切ですけど、気をつけて　ー　始めに、言葉の文脈をチェックするべきです。英語で書いてみたいも重要

I CAN AND I CAN'T

All correct | Word order change | Grammar, punctuation | Unclear

*we say "to ride a motorcycle"

**you don't need to say the word 'car' - we just say "I can/can't drive"

***the right sentence order is "[person][can/can't][verb][object]", e.g.; I can play tennis, he can't sing opera, you can eat peanuts

****to say the length of an action, you say "for [time]", e.g.; for six hours, for twenty minutes. With the word time, we say 'long time' or 'short time'.

***** to say how you do something, you use [verb]([object])[adverb], so "she walks quickly", "you dance well". Also, you don't need 'the' for English.

one of my experiences.

GREEN: rephrasing, word choice

PINK: grammar, punctuation

I could understand everything just fine, and I've just reworded some things to sound more natural. You just need to check punctuation and practice phrasing things more fluidly.

- to describe reasoning, you usually say "reason for ____ ing (something)", like "my reason for going to the doctor". Here, you could also say "One of the reasons why I want to learn English is...".

- instead of "travel for a long time", you can just say "go travelling", because we understand that to mean a long time.

- when you say "know my country" or "know Europe", are you thinking of conocer? In English, we'd say something like 'see', 'visit' or 'explore' when talking about a place (if it's a person, we say 'get to know').

Hello

*the original sentence made sense - I've just shifted it to sound more natural.

**for mentioning a past action, you usually use past simple (I visited), not past perfect (I have visited).

***even though you still love the country, you would use past tense to describe that feeling while talking about visiting America in the past.

**** "I'll be glad" makes sense, but we wouldn't use 'glad' in this context.