没问题用英语怎么说matter

No problem, "matter" can be said as "That's fine" or "It's okay" in English.

没问题用英语可以说成 "No problem" 或 "That's fine". 如果要表达“没问题”的意思，直接用 "That's okay" 或 "It's all good" 也都是可以的。

No problem, that can be said in English as "No problem" or "Sure, that's correct." However, if you specifically want to ask how to say "matter" in English, you can say:
"Is that okay?" or "Does that matter?"