I'm glad that you have enjoyed it! A sequel is actually planned, I'm hoping to start developing it in late Autumn of this year. It will probably be less of a direct sequel and more of an alternative story. I'm not too good with localizing games, but most of them can be hooked to a translation tool of some sort.
Steam releases for some of my games are planned, but they will still be completely free. If you want to support my work financially, the best way to do so is through SubscribeStar, but it's completely optional, my games become available to everyone after a month of early access. Secrets of the Bastion and the planned sequel sadly won't appear on Steam because the sexual content goes against their policy in some parts.