If you can speak English well: I am proficient in English. | Business English Yappi

If you can speak English well:

I am proficient in English.
I have a good command of the English language.
I am fluent in English.
I can speak English with ease.
English is one of my strong suits.
I am comfortable communicating in English.
I have a solid grasp of the English language.

If you can speak English not well but you are improving it:

I am still working on my English, and I am making progress.
I can communicate in English, but I am not yet fluent.
I am still developing my English skills, but I can hold a conversation.
I have some knowledge of English, but I am working to improve my fluency.
I am not completely confident in my English, but I am actively working to strengthen my abilities.