My first entry: Introduction

你好，我叫Lauri, 我在芬蘭學習商業管理。我喜歡運動，旅遊和學習語言學。

在2013的夏季時天，曾經在我去台灣學過習中文, 我學了習中文3個月. 真 。學習中文很有趣，但是有時候, 也太課時真的很無聊了。不過我再次去台灣2013年的12月，再往台灣, 住了2個月。太我很喜歡台灣了，而且我想要再次去那裡。

回来台灣之後，我一直在慢慢自地學習中文孤單。我想要學習中文學會了，就以便我可以和我的朋友們交談。我還沒有去過大陸中國，總有一天會但是我日後想去中國。但願如此果可能，我希望在那几讀書或者實習, 或者找 去中國學習還是工作。

Quite impressive, given the short period and your tenacity in learning the language.  However, although not grammatically incorrect, the sentences sound too wooden and artificial.  I corrected with emphasis from your English version.  It is good that you have provided one.  This way, you can see the detailed differences between how the two languages express.

1.  Unlike English or western languages, pronouns are often omitted when the context is clear.  If used, it is for emphasis.   Even in English, too much use of "I", "my" etc looks as if written by a child.

2.  To master a language, you need to know its culture, history and traditions.  Depending on the person's mood of the day, they can be quite sensitive to things or the way something is expressed.  Choice of words are extremely important.  Hence the need for knowing the local conditions. I always choose political sensitivity.  It would be akin to say Finnish is just like Danish, Swedish etc.

3.  學 = learn, study 習 = practise. So 學習 is "to learn and to practise".  However, in cultural preference, it is also better to use 學 alone when you are studying.  Use 習 when you are practising something.  溫習 literally is "warm practice" i.e. "to revise", "to review" with the notion of "going over again so until you are "warm" with it".  實習 = practical training or apprenticeship, internship etc.

4.  This is true for all languages, repeat only if you are emphasizing, otherwise it becomes naggy.

If you have any question, please don't hesitate to ask.  I believe that no question is stupid.  You ask because you don't know.  If you don't ask, you will never know, learn and improve :) Send me the link of your essay if you wished me to correct and have detailed explanations.

"Hi, I'm Lauri. I study business administration in Finland. I like exercising, travelling and studying languages.
In 2013 summer I went to Taiwan to study Chinese. I studied Chinese for 3 months. It was fun, but the class was sometimes really boring. I went to Taiwan again in December 2013 and stayed for 2 months. I like Taiwan and I want to go there again.
After Taiwan, I have been slowly studying Chinese alone. I want to learn Chinese, so that I can talk with my friends. I haven't been to China, but I want to go there someday. If possible, I'm thinking of going there to study or do internship/work."

My first entry: Introduction

你好，我叫Lauri。我在芬蘭學習商業管理。我喜歡運動，旅遊和學習語言。
在2013夏天，我去台灣學習中文。我學習中文3個月。學習中文很有趣，但是有時候課時是真的很無聊。我再次去台灣2013年12月，住了2個月。我很喜歡台灣，我想要再次去那裡。
台灣之後，我一直在慢慢地獨自學習中文孤單。我想要學習中文，以便我可以和我的朋友們交談。我還沒有去過中國，但是我日後想去中國。如果可能，我希望去中國學習還或是工作。

"Hi, I'm Lauri. I study business administration in Finland. I like exercising, travelling and studying languages.
In 2013 summer I went to Taiwan to study Chinese. I studied Chinese for 3 months. It was fun, but the class was sometimes really boring. I went to Taiwan again in December 2013 and stayed for 2 months. I like Taiwan and I want to go there again.
After Taiwan, I have been slowly studying Chinese alone. I want to learn Chinese, so that I can talk with my friends. I haven't been to China, but I want to go there someday. If possible, I'm thinking of going there to study or do internship/work."

My first entry: Introduction

你好，我叫Lauri。我在芬蘭學習商業管理。我喜歡運動，、旅遊和學習語言。
在2013年夏天，我曾去台灣學習中文。我，在那裡學習中文3個月。學習中文很有趣，但是有時候上課時真的很無聊。我再次去台灣是在2013年12月，住了2個月。我很喜歡台灣，所以我會想要再次去那裡。
從台灣回來之後，我一直在獨自慢慢地學習中文孤單。我想要學習中文，以便我是為了可以和我的朋友們交談。我還沒有去過中國，但是日後我想去中國。如果可能，我希望去中國繼續學習，還或是工作。

"Hi, I'm Lauri. I study business administration in Finland. I like exercising, travelling and studying languages.
In 2013 summer I went to Taiwan to study Chinese. I studied Chinese for 3 months. It was fun, but the class was sometimes really boring. I went to Taiwan again in December 2013 and stayed for 2 months. I like Taiwan and I want to go there again.
After Taiwan, I have been slowly studying Chinese alone. I want to learn Chinese, so that I can talk with my friends. I haven't been to China, but I want to go there someday. If possible, I'm thinking of going there to study or do internship/work."

我沒有照你寫的英文修訂，是因為我覺得語文和語文之間無法完全對照。然而口語化的敘述，可能使語言更生動和流暢。我想你已寫得相當完整而順暢，甚至用了＂以便＂和＂日後＂，都是不錯而精簡的字辭。

My first entry: Introduction

你好，我叫Lauri。我在芬蘭學習商業管理。我喜歡運動，旅遊和學習語言。
在2013夏天，我去台灣學習中文。我學習中文3個月。學習中文很有趣，但是有時候上課真的很無聊。我2013年12月再次去了台灣，住了2個月。我很喜歡台灣，我想要再次去那裡。
台灣之後，我一直獨自慢慢地學習中文孤單。我想要學習中文，以便我可以和我的朋友們交談。我還沒有去過中國，但是我日後想去中國。如果可能，我希望去中國學習或者工作。

"Hi, I'm Lauri. I study business administration in Finland. I like exercising, travelling and studying languages.
In 2013 summer I went to Taiwan to study Chinese. I studied Chinese for 3 months. It was fun, but the class was sometimes really boring. I went to Taiwan again in December 2013 and stayed for 2 months. I like Taiwan and I want to go there again.
After Taiwan, I have been slowly studying Chinese alone. I want to learn Chinese, so that I can talk with my friends. I haven't been to China, but I want to go there someday. If possible, I'm thinking of going there to study or do internship/work."

From Lauri...

... I've been wondering is 忘 and 忘記1. Maybe I just need more practice :) I was thinking, is 時 necessary in "夏季時"? 2 Doesn't 夏季 already express that the topic is summer? Or is it required because I'm talking about my experience in the past? Thank you for noting the cultural and political view on Chinese. I'm generally aware about the situation between Mainland China and Taiwan but I'm not sure how should it affect the way how I speak Chinese. 3 That reminds me, I was wondering what would be the proper way to talk about Chinese language?  I was taught to use 中文, but other people seem to use 漢語. 4 Then there is the (Country name) + 語. 5 How do they differ in spoken language? Thank you in advance for your reply, Lauri

1.  忘 just means to forget.  記 = remember.  Thus 忘記 literally means "[you had] forgotten [what you ought to ] remember.  記 by extension also means a record [so that forgetfulness won't happen].  For example, 西遊記 (The Monkey King, The Western Journey etc) literally means the "record of the journey west.  Modern Mandarin likes to use double words, perhaps due to the preference of having "eveness".  Idioms which generally comes from Classical Chinese in which one word suffices.  E.g. 忘恩負義 = forget kindness, turns-one-back-on righteousness aka "being an ingrate".  Spoken Chinese is very different from the way the language is written.  It is just like all other languages, the written form is more formalized and is seen as being elegant.  It would be bizzare to hear speak in rhymes or uttering poetic forms in daily speech.

2. 時 must be used.  This is because Chinese does not have tenses to indicate the time. In English, we write, "It was during/in summer that I went..." = 夏時, 我曾經去過...  here 時 is the time indicator for "was during".  A more colloquial way of saying would be, 在夏天時 = "At the time of summer" or even 在夏天的時候, would be the preferred way (and more informal) to speak.  Since you are writing an essay, I opted for more formality.  Yes, I had a very "pendantic" collegue Chinese professor and would expound the subtle differences so that all his students will be of a magnitude higher than others learning the language.  He always forcefully reminded us to ask questions.  If we don't, he would then ask us back to explain to him!

3.  The differences would be very similar to how English is spoken.  A native speaker will definitely know if you are from the UK, the US, Australia etc...

4. There are many terms in which Chinese (the language) is expressed. It depends on who you are, where you are from etc.

漢語:  A term used to denote the Chinese language when compared to other languages that also use Chinese characters in their languages such as Japanese, Korean and Vietnamese before it became latinized.  Historically, it is used by Imperial China to describe the language used by the Han people (named after the golden age of the Han Dynasty).  Use this when you are talking in a historical context or when comparing languages.

中文: This is the modern term used by the Chinese after the fall of the Manchu Dynasty when the term 中國 is preferred as the term for the country.  However, we don't use 中國文 as it is too wieldy.  Hence 中文.  This also answers your question 5. The same reason for English, 英文 instead of 英國文 etc.  As in English, Russian would be 俄文.  There are exceptions...  Italian would be 意大利文 because there's no short form for it.  文 actually means "culture".  Chinese philosophy believes that if there is no language, there's no culture and so it is synonymous with "language" As for the word 語, this literally means the "spoken word" and thus by extension "language".  So 語 can be used where 文 can be used for languages.  However, like in English, there are exceptions.  No Chinese would say, 中語 to mean Chinese.  This is cultural preference because the 中 means middle as in "Old English", "Middle English" etc.  Cantonese would prefer to use 唐話 because it was not until during the Tang Dynasty that the Sourthern areas were incorporated into the proper Chinese empire. 國語 = national language would be Mandarin used in Taiwan and HK.  普通話, the common language would be used in Mainland China.  Those from the overseas Chinese communities, 華語 is the preferred choice since the national language say, in Malaysia, the national language is Malay.

This leads to a similar situation when referring to the Chinese people.  Depending on where you are from, different terms are used.  中國人 in the old days before the split means the ethnic race, Chinese. Nowadays, from mainland China.  Overseas Chinese prefer the term 華人.  This again leads to the translation of "Chinatown".  The proper and politcally correct term is 唐人街, the "streets of Tang Dynasty man".  This is derived from the Cantonese who were the first Chinese to emigrate to other countries because of the opening of the seaports after the Opium War.  中國/成/埠 maybe OK to the Mainland Chinese (by the way, 大陸人, "mainland people" would be unambiguous) but can be quite sensitive to those Americans with Chinese ancestry calling the place, a "Chinese city" due to the past racism in the US.  I can go on and on with political sensitivism over here.

If you interested in such details, here's a link...

http://en.wikipedia.org/wiki/Names_of_China