Learning a foreign language in order to get more out of art, literature, or poetry is already a very niche hobby and one risks being accused of snobbism or privilege for suggesting it. Art, literature (of the kind where learning the original language could be important), and poetry themselves are niche hobbies.
Culture is not only art. An LLM won't help you naturally drop you a "cuidao chacho que toy mu loco" nor "в жёлтом доме по тебе скучают", nor will it translate it into something that carries the exact meaning to you in English, nor reference any equivalent cultural element, for the foreseeable future. You'll need embeddings common life experiences, and even intonation can completely change the meaning even retaining the emphasis.
It will help you communicate, but not partake.
Let me tell you about a little thing called kpop. Korean language courses are booming.
I don't know your history, but this sounds like a monolingual person not understanding and being arrogant about it. It's not a niche hobby if that's literally your life. Many people are not multilingual as a hobby, or as a choice.