"Wish mom happiness forever" can be translated to "祝妈妈永远快乐" in Chinese.
This is a common way to express well wishes for one's mother in Chinese culture, wishing her to always be happy and healthy. It is a common way to express love and gratitude towards one's mother.
Here are some examples of this phrase in a sentence:
"I wish my mom happiness forever." (我祝我妈妈永远快乐。)
"Happy birthday, mom. I wish you happiness forever." (妈妈生日快乐，祝你永远快乐。)
"Thank you for everything, mom. I wish you happiness forever." (妈妈，谢谢你的一切。祝你永远快乐。)