See https://demo.matomo.cloud/index.php?module=CoreHome&action=index&idSite=1&period=day&date=yesterday#?idSite=1&period=year&date=2020-11-15&segment=&category=Goals_Goals&subcategory=General_Overview when selecting Deutsch (German) in the language selector.

You can see eg conversions should be "232469" but it is shown as 232,47 in German which means 232.47 in English. So the shown value is 1000 times lower than expected. This also applies to the other goals on the same page

and it applies to the individual goal pages

Was wondering if it is maybe related to #15262 but don't think so.

@sgiehl maybe we already have an issue for this? Couldn't find anything. I suppose it's not an easy fix? (just asking in case you remember from previous fixes)