I'm probably more familiar with "fake" Lalique signatures on odd and decidedly non-Lalique bits of glass than i am with the correct mark!
No accusations at all - (where did that come from? :thud: ) - it merely looks as if somebody, at some point in time, has put this mark on a vaguely Lalique-y piece.
Can you make out any of the letters in the mark at all? (apart from the R and the L, and the sort of q-ish downstroke towards the end)