@firstname.lastname@example.org To translate the “Sign In” and “Sign Up” you don’t have to use Loco Translate you can change them directly from Theme Settings >> Login/Register >> Registration title and Login title option.
@mfatih94 thanks for helping others in our forum. We really appreciate it.
I thought you were talking about your account page. To translate the Sign In, Remember me etc from login sidebar you need to use loco translate, go to Loco Translate >> Themes >> WoodMart >> Search for your strings and translate them and save the changes.
In case after doing this if this still not works then click on “Sync” button shown next to “Save” and then check the results after clearing your site and browser cache.