Why is english difficult/confusing to learn for people who don’t know the language? be specific.

English is difficult/confusing for people who don’t know the language because in some languages there are cognates and that can get someone confused because it might not mean what it looks like. Another reason is because it’s something hard to remember and most times you just end up mixing the languages when you talk.
For example: English is my 3rd language and because I’m still learning the language I often mix it with the other 2 languages I speak.

English is confusing for people who don't normally speak/know the language because they are learning a whole new language, and this may be difficult for them. English is a very complex language to learn, and it took me a while to completely learn. Yes, it seems that I have been speaking English all of my life. However, this is not true. I was born outside of the United States of America, and I didn't start learning English until about 9 years ago. Since then, I have been in an English-Immersion school, where I am exposed to the language all the time. I am also the only English speaker in my family of five. To be precise, I am the only person in my family to speak multiple languages. 
I speak:
- English 
- French
- Spanish
- German
- Latin (even though it is not commonly used anymore)
- Icelandic
- Lastly, but definitely not least, I am working on Mandarin (Chinese) and I am almost there!
Hope this helps! You can include the personal experiences of someone in whatever you are doing for this question.