Both "poetic rain" and "poetic language" have very good meanings, and the specific choice depends on personal preference and context.
"Poetry Rain" has rich meanings. On the one hand, it expresses the poetic and picturesque artistic conception, and on the other hand, it also implies the delicate emotions of moistening things silently. In many cultures, rain is often given a beautiful meaning, such as spring rain nourishing the earth, reviving all things, and giving people hope and vitality. Therefore, "Poetry Rain" implies beautiful emotions and delicate feelings. "Poetry" puts more emphasis on the language and expression of poetry. It implies that the words are beautiful and poetic, giving people the enjoyment of beauty. In many cultures, poetry is used to express emotions, praise nature, and praise beautiful things. Therefore, "poetry" also implies beautiful emotions and a positive attitude.
In short, both "poetry rain" and "poetry language" have very good meanings, and the specific choice depends on personal preference and context. If you want to express a picturesque artistic conception and delicate emotions, you can choose "Poetry Rain"; if you emphasize more on the language and expression of poetry, you can choose "Poetic Language".