Copying this from Mingle (https://wikimedia.mingle.thoughtworks.com/projects/online_fundraiser/cards/982) as it is still a priority for Donor Services to show the currency code in the TY letter. Apologies if this exists in Phab already.

We have partial support right now in ThankYou for localization, but K4 added a lot of code to MW CLDR for other things. Primarily we want to get complete CLDR for the currency string based on lang/country.

We wish to end up with something like: Mex$ 45,000 (Mexican Peso). We already have numeric formatting; but we need to substitute in the currency symbol and currency name lookups.

Related bug to track, this is to support crazy MediaWiki-under-Drupal librariness: https://bugzilla.wikimedia.org/show_bug.cgi?id=52129

Deployment

https://gerrit.wikimedia.org/r/#/c/76214
drush en mediawiki
Clone mediawiki-core and point to it in the admin panel, /admin/config/mediawiki, or use "drush vset mediawiki_root DIR".
WIP