Translations:Global templates/Proposed specification/90/en

Ideally, the global template should have generic internal parameter names that have translations to different languages. This is somewhat similar to Wikidata property name labels, but it can be simpler: since English is a kind of a lingua franca for software developers and templates are a kind of software, it’s probably OK to have English as the default source language rather than generic numbers as it is in Wikidata.