My English still needs work.

Core Sentences
1. Do you speak English?
2. I'm proficient in English, and I can speak a little German.
3. My English still needs work.
4. How long have you been studying Spanish?
5. What is your mother tongue?
6. Italian is her native language, but she speaks French fluently too.
7. How many languages do you speak?
8. I can read and write in three languages.
9. How well do you know Chinese?
10. She speaks mandarin with strong accent.
11. Lots of foreigners have trouble writing Chinese characters.
12. Everyone makes mistakes when they are learning to speak.
13. As for me, reciting is essential to mastering a foreign language.
14. Will you slow down? I can't follow you.
15. What do you mean by “Chinese Characteristics”?