Switch the global language in admin mode just like in user mode via the language selector.  "DB EXPORT/IMPORT" buttons right beside the red logout button provide functionalities to export (and auto-translate) DB entries in EXCEL format as well as import such EXCEL files to mass-update desired entries.  AWS is used whenever a text translation takes place: This is either the case (a) when using the "DB Export" functionality (denoted by the "Down-Arrow" button next to the red logout button or (b) during text edits when using functions of the "TRANSLATE" panel (denoted by a globe icon right beside the well-known "COPY" panel - in case the admin has access to it).  The "FROM/TO" language-flags in the top-right corner of the admin screen have a sole purpose, i.e. to make multiple "TRANSLATE" operations more convenient by including your "(cookie-stored) flags settings" as dynamic "TRANSLATE" panel option.  See the monthly-based counters below. Whenever AWS translations are executed, the number of translated characters are counted.  The admin search is very powerful as it allows to to quickly find and adapt entries and text blocks across the WHOLE homepage and ALL languages. In admin mode all search terms must be present for matches. In order to perform a search (a) enter your search terms in the search field and (b) choose a DB topic (e.g. SYSTEM or META) via the checkboxes at the top of the search panel. (c) Optionally use special search terms/filters like "languages=es,en" or "from=08.05.2020" and/or "to=08.05.2020" to narrow down your search with respect to limited languages or last modifications dates.
"AMAZON Web Services" character translation counts per month: