Yes, your "Lincolnshire Shepherds : 1 to 10 yan / tan / tethera / pethera / pimp / sethera / methera / hovera / covera / dik / 11 to 20 yan a dik / tan a dik / tethera dik / pethera dik / bumfits / yan a bumfits / tan a bumfits / tethera bumfits / pethera bumfits / figgits"
fits in well with the Welsh Equivalent 1 to 10: Un / dau / tri / pedwar / pump / Chwecch / saith / wyth / naw / deg
11 to 20:
Un ar ddeg / dau ar ddeg / tri ar ddeg / pedwar ar ddeg / pymtheg / un ar bymtheg / dau ar bymtheg / tri ar bymtheg / pedwar ar bymtheg / ugain.
Nigel