Hello,
Thank you very much for choosing our theme and for contacting us.
Please provide the screenshot of the problem and page URL
In general, our theme is already optimized and don’t have too many resources to make your website slow. Most likely, your website performance suffers from the content you have added to your website. It may happen in case of too many plugins, large not optimized images or other resources. So we suggest you to remove unnecessary plugins, install some kind of JS & CSS optimizing plugins like Better WordPress Minify and a caching plugin like WP Super Cache. Also, you can use GTmetrix tool to see what makes your website slow and optimize these parts of your website.
We have not tested the theme with the plugin you mention if you need to translate your site, use free Loco translation plugin. 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