And it is Welsh.

From the Merriam-Webster website:

Main Entry: welsh Pronunciation: 'welsh, 'welch Function: intransitive verb Etymology: probably from Welsh, adjective Date: 1905 1 : to avoid payment -- used with on 2 : to break one's word : RENEGE - welsh·er noun

A quaint reminder of the mutual respect between the English and Welsh nations that has existed for about 1500 years.