alt Hacker NewsThe other comments about calligraphy, copy, competitors, etc are not useful for getting users. This app is already over-engineered.
Go on TikTok and Instagram Reels, scroll for a week 15 mins a day in the language and travel niches. Don't post until you've done that!
Then post funny, scroll stopping videos. In the comments, and in your bio, mention your app.
It's funny, making an app these days is the easier part. Getting people to use it, any substantial quantity of them, is where it's difficult.