あなたともっとたくさん話したいから、英語の勉強頑張るねって英語でなんて言うの？

"I am going to study English more so I can talk to you better!" Going to study - What you are going to do so you learn more English. Better - clearer, with more words, etc. "I am going to study to improve my English so I can talk to you more." Improve - Get better, more confident Talk to you more - To talk with longer sentences, more variety of words, etc.

Both of these examples are nice ways to tell your friend that you want to speak to them more and that you'll have to study English more. "I'm going to work on my English so we can talk more!" is a nice and simple way to say this. 'Work on' means to study more.

In English, it is not always necessary to detail exactly what you will be, or are, doing, as the context makes that clear. "I'm going to get brilliant at...(something)" Obviously, 'to get brilliant' at something requires a lot of work or study or preparation, so what you have to do to get brilliant does not have to be stated.

People always do something for a purpose and, in your case, it is because you would like to speak with this person more so that you have resolved to learn English well. For this one purpose, you would like to master the English language. The verb to 'master' means to acquire complete knowledge or skill of the English language in this case. So, you may say: I will make sure that I learn English well so that I can be able to speak with you more. or I want to master English in order for me to communicate with you more.

When you're trying to express to your friend that is abroad that you're planning to work hard on improving your English because you want to talk to them more, then you can say: -I want to improve my English so I can speak to you more -I am going to work hard on my English studies is because I want to speak with you some more.

I am learning English for you is straight to the point, without being specific. If you would like to express in more detail that you are learning English so you can communicate better with that person, you can say how much you really want to be able to express yourself and have a deep conversation with that person, therefore, you are doing your best to learn as much English in as little time possible. " I have a strong desire to communicate with you, so much so, that I am working hard to learn English"