Is it offensive to use other writing systems with your own language?

Hi!

A bit of context first.

I'm a native Spanish speaker. So far, I only know English (so-so) and just a bit of French, but not much. However, I tried to learn Russian and Japanese at some point, but I took a break from them for different reasons, although I learnt both Russian cyrillic and Hiragana. Recently, I decided to learn Hangul, not Korean, just Hangul; I plan to learn Korean at one point in the in the future, but for now, I wanted to know its writing system.

I personally like writing systems. Some are incredibly complex, others are simple; some are used by many languages, other by just a few. And I have this tendency to sometimes, not always, write my own language in one of these scripts, sometimes to keep them fresh in my mind, sometimes just for fun since, like I said, I like them.

My question, which could be actually two, is, or are, i don't know: Is this offensive? Is this wrong? I don't know if by doing this, I could eventually offend someone who actually talks the language if they see what I write, which at the end it may he gibberish for them, but is my language, Spanish.

Again, I do it to keep them fresh in my head, or just for fun, never to insult anyone, but I would like to know if it could happen.

That's pretty much, thank your for your attention!