Hi there! If you need to localize your Rail app for international markets, there are some online solutions that can help, but my recommendation is to go with POEditor. It is a software localization management platform, with a neat and simple work interface to handle. The tool doesn’t support .yaml formats for now, but , you can convert them to po formats using this free converter tool http://yml2po.com/. It worked for me, maybe it can be useful for you too.