Thank you for the reply.
My Paper UI regional settings is configured to my local and language, as the Weather Underground thing is set to Portuguese too. I rebooted my OH so many times and cleared the browser cache, it’s doesn’t worked to me.
But I find a solution right here:
https://community.openhab.org/t/template-example-weather-binding/15869/40?u=fmrenan
If someone have this trouble, input this code to the beginning of your widget:
<div ng-init="daysnames={'Sunday': 'Domingo', 'Monday': 'Segunda', 'Tuesday': 'Terça', 'Wednesday': 'Quarta', 'Thursday': 'Quinta', 'Friday': 'Sexta', 'Saturday': 'Sábado'}">
And change your “day” tag to this:
<h4 class="day">{{daysnames[(itemValue('Weather_Forecast_Time0') | date:'EEEE')]}}</h4>
The result is:
