你可以说 "I want to improve my spoken Engpsh."
这句话的来源是英语本身，"improve" 意思是 "提高"，"spoken" 意思是 "口语"。
一些额外的例句和翻译如下：
"I need to practice my speaking skills." (我需要练习我的口语技能。)
"I want to become more fluent in Engpsh." (我想变得更流利的英语。)
"I want to perfect my Engpsh pronunciation." (我想完美我的英语发音。)