I decided that i will be English speaker.

Today is Commemoration day for me. Because i decided that i learn and study English more than now.I'd love to go on to University of Second language.learning language is not easy but　staunch.After this i hard learn.

I have decided that I will become an English speaker.

Today is a special day for me, because I have decided that I want to put more effort into learning and studying English than I have before now. I'd love to go on to study a second language at university. Learning a language is not easy, but I will persevere. I will continue to work hard.

英語が難しいから、がんばってください、ね＾＾

I have decided that i will be English speaker.

Today is Commemoration day for me. Because i have decided that i will learn and study English more than now. I'd love to go on to University of Second language. learning language is not easy but 　staunch. After this i hard will learn with more dedication.

Sorry , I could not understand that what do you mean by Staunch in this sentence.