Hello,
Please go to:
WordPress Admin Dashboard → Appearance → Menu
1: Click on Screen Options and then activate the: “CSS Classes” (https://ibb.co/Vjy0bPM)
2: Add your languages to the menu (https://ibb.co/Q6C4m5T)
3: Select the first language you added (In my case that is the Japanese) and in: “CSS Classes” add a unique CSS class (in this case this will be .trp-dash-menu and then save) (https://ibb.co/3sHxwq4)
4: Go to:
WordPress Admin Dashboard → Appearance → Customize → Additional CSS and add the following snippet into it.
.trp-dash-menu::after {
content: "|"
}
https://ibb.co/fdpGCdW
By following these steps you will be able to recreate the menu from the website you mentioned.
I was wondering, once you will have started using TranslatePress for a while, will it be too much to ask for you to leave a review on https://www.ads-software.com/support/plugin/translatepress-multilingual/reviews/?
One or two sentences will do it and it may help us to reach more people as well as get feedback from existing users.
Kind regards,