See: https://www.proz.com/forum/memoq_support/349861-mass_confirmation_of_number_only_segments_after_mt.html
Use regex to mass-confirm number-only segments 16 Mar
There's an easy way of achieving just that, assuming the numbers are supposed to look the same on both sides (source and target).
Click the sprocket icon over the translation grid and check the “Use regex” checkbox
Type ^\P{L}*\d\P{L}*$ in the filter field over the source column and press Enter
Press Ctrl+Shift+A to mark all segments; then Shift+Alt+S to copy source to target; then Ctrl+Shift+Enter to confirm all the segments without committing them to the TM; then Ctrl+L to lock them