The mix of English and Korean make it hard for one language to play it. Maybe update with languages selectable and only have that language for the player?
You were right, and thanks for saying it — this was the third report and I'd been fixing the wrong thing. The menus were already translated, but the combat log wasn't: 111 messages, all hardcoded Korean, and that's the text you read most while playing. Fixed and live now. Hard refresh (Ctrl+F5) to get the new build. If you spot any Korean left anywhere, tell me and I'll patch it today.
Hugely helpful — thank you for coming back with specifics. Where things stand: inventory is now the full 42 (6×7); the combat log is fully English now (that was the big leak — 100+ hardcoded lines); and auto-hunt no longer drags you between maps — it stays where you put it, your call which zone to farm. Your smarter auto-sell idea (only sell when base value ≤ your equipped base value, keep the best per slot) is exactly right for the late-game Hero-item clog, and it's next on my list. The two spots in your screenshots — the enchant-scroll tooltip and the browser tab title — I'm re-checking right now and will patch today if any Korean is left. Really appreciate the care you put into these.
One more thing — I made a small thank-you for people who reported bugs. Click the 🎁 button in-game and enter THANKYOU. It gives a [Bug Hunter] title and some travel scrolls. Deliberately no stats: free gear ruins the early game, I learned that the hard way earlier this week. It's just a name tag. Thank you for taking the time to write.