You can't translate this directly, as it's an english 'casual' phrase. some options could be, depending on the country we're using the spanish in, 'Vuelvo pronto' ([I will] come back soon) [polite] 'Ya vuelvo' ([I] come back) [casual] 'Volveré pronto' (I [am going to] come back soon) [polite] These are pretty neutral, and unless you use specific dialect words, they should be understood by any spanish speaker

I like teach spanish ok

en Argentina decimos "ya vuelvo"

regresare

ya regreso