To translate YAML files with POEditor, you first need to set up your localization project. Here are the steps.
1. Create a localization project
Log in to your POEditor account, click on Add New Project to create a translation project and add a language to it (the software's source language).
2. Import strings from YAML file
In the project page, click on Import to upload the strings from your YAML file.
Don't forget to choose to Also import translations to... the language you added at step 1.
This language will automatically be suggested as your project's Default Reference Language after you import the translations. You can change the Default Reference Language in the project's Settings.
3. Localize YAML file into target languages
Add the languages you want the app localized in, invite contributors to join the translation and start localizing your app. You can find more info about how to manage contributors here.
When you are done with the localization, you can export your localized languages to your computer by using the Export button in any Language page.