Hi! I’ve never studied two languages at once so I’m not sure how well I can advise you, but I know there are lots of tips online and on language blogs about studying multiple languages. Probably even a few langblrs about studying both Korean and Spanish, so look those up. It sounds like you just need to be a bit more consistent with your Korean studies so you don’t forget things. I would usually recommend a ‘little and often’ approach to studying, so try to get some Korean in every day/every other day/every week etc. even if it’s only something really small. If your Spanish is at a higher level you could try learning Korean through Spanish so you can practice both, or every time you study Spanish you could learn a bit of Korean on the same topic.

If anyone else has more advice on learning multiple languages please let us know!