"Thank you for helping me learn Chinese" 可以用 "谢谢你帮我学中文" 来表达。这是一个非常常见的用法，它来源于英语和中文中都有类似的表达方式。
举个例子:
"Thank you for helping me with my Chinese homework" 可以翻译成 "谢谢你帮我做中文作业"
"I really appreciate your help in learning Chinese" 可以翻译成 "我非常感谢你帮我学中文"
"Thanks for teaching me Chinese, it's been a great help" 可以翻译成 "谢谢你教我中文，这对我很有帮助"