Folow line is from jquery.tablesorter.js function cacheRegexs() currency:
Line 465: new RegExp( /^[£$€?.]/)
The ? and . is not a currency character. Use RegExp( /^[£$€¥¢]/) instead or RegExp( /^[\u00a2\u00a3$\u20ac\u00a4\u00a5]/) for [cents pound dollar euro yen currency].
For enhancement leave the ^ so that RegExp( /[£$€¥¢]/) or RegExp( /[\u00a2\u00a3$\u20ac\u00a4\u00a5]/) find the currency character also at end. In many languages, so in German, is the currency character at end: 10,50 €
In German Wikipedia the bug produces a unsortable column. If the year not set in template {{dts|20|07|}} a sortkey "?-07-2020. Juli" is used and sorting to currency gives in all rows 0 at digit-sortkey - this is unsortable. (see: [[w:de:Vorlage_Diskussion:Dts#Vorlage_ohne_Jahr_nutzlos]] )
here is table to test it:
{| class="wikitable sortable"
! dts key 3 !! 4
| - | |||
| {{dts | 19 | 8 | }} |
| ?-08-19 | |||
| $ 15.00 | |||
| 15.00 € | |||
| - | |||
| {{dts | 28 | 07 | }} |
| ?-07-28 | |||
| $ 10 | |||
| 10 € | |||
| - | |||
| {{dts | 23 | 7 | }} |
| ?-07-23 | |||
| $3.50 | |||
| 3.50€ | |||
| } | |||
Version: 1.20.x
Severity: major