Hello,
Thank you very much for choosing our theme and for contacting us.
You can set the language in Dashboard > Settings > General
You can translate all theme and plugin texts via PO file in WordPress. Here is a video tutorial that should help you translate your website texts with a Loco Translate plugin https://www.youtube.com/watch?v=D3NsDdMzsls&list=PLMw6W4rAaOgKKv0oexGHzpWBg1imvrval&index=3
We suggest you to keep translated files in wp-content/languages/themes/woodmart-pt_PT.po folder.
Best Regards