Yeah, that was a good suggestion. ^^Not having a credit/debit card and region locks definitely limits your options. I don't think the dev has made any other forms of payment available but if I were you I'd join the discord and see if you can DM the dev directly to try and work something out.
I actually did that already after sending the post, and somehow came up with the idea to join the translators team. Pretty sure the hour investment is way more expensive than simply buying/donating for the game, but hey. Support is support