diff --git a/src/lang/welsh.txt b/src/lang/welsh.txt
--- a/src/lang/welsh.txt
+++ b/src/lang/welsh.txt
@@ -3,8 +3,8 @@
 ##isocode cy_GB
 ##plural 0
 ##textdir ltr
-##numberformat 00,000,000,000,000,000,000
-##numberabbreviations 3=00,000,000,000,000,000{NBSP}k|6=00,000,000,000,000{NBSP}m|9=00,000,000,000{NBSP}bn|12=00,000,000{NBSP}tn|15=00,000{NBSP}Qa|18=00{NBSP}Qi
+##digitsep ,
+##digitsepcur ,
 ##decimalsep .
 ##winlangid 0x0452
 ##grflangid 0x0f