Hey, I was wondering if having someone translate stuff is enough. There are a couple ways to go about it, one of them is finding someone. But you can also set up a public spreadsheet using Google Docs, I'm not sure what's the ways to implement translation in Construct 3. But Google Docs support .csv export format. And from my knowledge, many engines use it as their translation table. This way, anyone can just come in, and translate the game for you. And all you would have to do is import this spreadsheet into Construct once in a while. There might be some issues with people coming in and “raiding” the translation doc, but Google Docs has a rollback system (File > Version History > See Version History), so you can roll back anytime.
Edit: Just stumbled upon this mod on nexus, it adds a Ukrainian translation to the game. And by the looks of it, I personally think it's really well-made