I've read that your plugin supports internationalization and I tried editing the ninja-forms.po file using Poedit and when saving it as es_ninja-forms.po, I receive this errors:
21:41:16: /Users/vcantu/Documents/CycleNetworks/Clientes/Cantubos/plugins/ninja-forms.po:953: duplicate message definition...
21:41:16: /Users/vcantu/Documents/CycleNetworks/Clientes/Cantubos/plugins/ninja-forms.po:581: ...this is the location of the first definition
21:41:16: /Applications/Poedit.app/Contents/MacOS/msgfmt: found 1 fatal error
I'd appreciate if you give me some tips.
By the way, I offer to make the translation into spanish, if you're interested in.
Thanks in advance,