Is using Korean letters for various things considered culture appropriation?

SakuraChii
I need someone to explain this to me. I in no way want to be disrespectful to any culture. I basically watched this video about culture appropriation and this Korean American girl was saying that she hated it when people had hangul (Korean symbols) in their name, mood/motto and in messages online. Since its seen as using her language as a decoration. She also said that if you can easily translate the word into English then you should use it in English and not Korean. I don't understand this. I had foreign penpals in the past who used English phrases a lot, wear shirts with English and used English in their name or gave themselves an English name. I like East Asian languages so of course I'm going to be studying Korean, I have Korean words that correspond with my furniture so that I won't forget.

I also have the wallpaper on my phone with Korean phrases, so that I won't forget either and I'm starting to use Korean for my mood on this Korean app since my penpals are Korean and I wanted to use the language more since I can't learn it in school. I was also thinking of getting a tattoo in another language that's either European (French) or East Asian when I'm older. I'm leaning more on getting a French tattoo since I'm more comfortable in the language (I would be able to understand if someone screwed up my tattoo and wrote something innapropiate) and a lot of people get upset if it's an Asian language. I like Korean and I like how different Hangul looks but I don't want to be disrespectful.
Is using Korean letters for various things considered culture appropriation?
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