Data › Wording edits the project's translation keys — the strings templates print with the {{t "group.key"}} helper: button labels, headings, e-mail phrases. One row per key, one column per locale; empty cells are omitted rather than stored.
Keys are grouped (one document per group and locale). Groups and keys are added or deleted here, never renamed — the templates already carry the tags, and renaming would silently break them. The render servers pick up edits through the data hooks like any other document.
Two groups never show here: tag and category are the product taxonomy's label stores, edited on Data › Tags and Data › Categories (see Products & stock); creating a group with either id is refused with a link to its page.
Needs the content capability.