If the report is regarding the "es" (Spanish) translation progress:
While a single "official report" for this specific tag isn't publicly generated as a standalone document, you can access the data it likely refers to through Mozilla’s public transparency and technical reporting tools. es.mobile.firefox
: Used to generate and view performance profiles for the mobile browser. If the report is regarding the "es" (Spanish)
The provides real-time updates on the completion status of Spanish language strings for the mobile app. es.mobile.firefox