Translation files BREAKS date selector

The date selector in WooCommerce->Analytics->Revenue seem to be hardcoded to American formatting, even though the rest of my site have Swedish formatting.

Also, the WooCommerce translation files are breaking the date selector, as they are translating YYYY into \u00c5\u00c5\u00c5\u00c5 – and that returns ???? instead of the actual year.
See Broken date selector

A sitewide Search&Replace of \u00c5\u00c5\u00c5\u00c5 to YYYY only found WooCommerce language files:
See Search phrase

And that made the date selector work again – no more “????”, but the actual year in numbers. Still in American formatting, sadly, but it is working.
See repaired date selector