Translating tag group names is very straightforward with the WordPress Multilingual (WPML) plugin.Before you start, you need to set up WPML with all required languages.Then you open the Tag Groups admin page where you create and edit tag groups. This page will not look much different from what you are used to. But now you can edit the names of the groups for each language independently.All you need to do is to switch to another language in the admin bar and edit the names of the tag groups. If you now change the language, you will notice that the group names will change accordingly.
Where The Translations Show Up
On all admin pages, you see the group names that correspond to the language that you see in the admin bar.
On the front end, the group names match the language of the page.
Some More Details
If you create a new group while you use a language that is not your default language, the default language will first receive its group name from that translated language so that it won’t remain empty.
The order of the groups is the same across all languages.
The label “not assigned” remains untranslated on your back end. On the front end you can choose the translation in the shortcode.
Each language version of a tag can belong to a different group.1
If you create a translation of a tag, the translated tag will receive the groups of the original tag, unless you set different groups during the translation.
Because WPML internally treats them as different tags. ↩