  In this study, we construct a 1+1-dimensional, relativistic, free, complex
scalar Quantum Field Theory on the noncommutative spacetime known as lightlike
$\kappa$-Minkowski. The associated $\kappa$-Poincar\'e quantum group of
isometries is triangular, and its quantum R matrix enables the definition of a
braided algebra of N points that retains $\kappa$-Poincar\'e invariance.
Leveraging our recent findings, we can now represent the generators of the
deformed oscillator algebra as nonlinear redefinitions of undeformed
oscillators, which are nonlocal in momentum space. The deformations manifest at
the multiparticle level, as the one-particle states are identical to the
undeformed ones. We successfully introduce a covariant and involutive deformed
flip operator using the R matrix. The corresponding deformed
(anti-)symmetrization operators are covariant and idempotent, allowing for a
well-posed definition of multiparticle states, a result long sought in Quantum
Field Theory on $\kappa$-Minkowski. We find that P and T are not symmetries of
the theory, although PT (and hence CPT) is. We conclude by noticing that
identical particles appear distinguishable in the new theory, and discuss the
fate of the Pauli exclusion principle in this setting.
