please, check my letter for grammer
This is my one paragraph on letter.
could you check it?
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I would like to express my strong interest for participation at YYY in the winter of 2016 best. My first reason for this choice is that English is the universal spoken language in YYY's country. I have to be capable of doing the project in English because more and more multinational companies are mandating English as the common corporate language. For this, I am going to live in sharing house with foreign friends during the summer semester in XXX so that I improve my spoken English and study continuously major-related topics in English during the winter semester in Dublin this year. Other reason is that YYY's country is emerging as a global technology hub. Consequently, YYY's country has its strong reputation as one of most felicitous centers for high technology businesses in the world.
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thank you :)

Question

please, check my letter for grammer
This is my one paragraph on letter.
could you check it? 
---
 I would like to express my strong interest for participation at YYY in the winter of 2016 best. My first reason for this choice is that English is the universal spoken language in YYY's country. I have to be capable of doing the project in English because more and more multinational companies are mandating English as the common corporate language. For this, I am going to live in sharing house with foreign friends during the summer semester in XXX so that I improve my spoken English and study continuously major-related topics in English during the winter semester in Dublin this year. Other reason is that YYY's country is emerging as a global technology hub. Consequently, YYY's country has its strong reputation as one of most felicitous centers for high technology businesses in the world. 
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thank you :)

Answer

I would like to express my strong interest for participation at YYY in the winter of 2016. My first reason for this choice is that English is the universal spoken language in YYY's country. I have to be capable of doing the project in English because more and more multinational companies are mandating English as the common corporate language. For that reason, I am going to share house with foreign friends during the summer semester in XXX so that I improve my spoken English and continuously study major-related topics in English during the winter semester in Dublin this year. Another reason would be that YYY's country is emerging as a global technology hub. As a result, YYY's country has a strong reputation as one of most felicitous centers for high technology businesses in the world.

I changed a couple of words that I think would help the flow of the sentence. If you need any other help please feel free to ask. I hope this helped.