There are tags lattices and lattice-theory, both being used for the two unrelated meanings “partial order with binary suprema and infima” and “discrete subgroup of $\mathbb R^n$”. I’m not sure it’s feasible to sort out the ~300 questions involved, but maybe we could try at least to alleviate the problem for future by deciding which tag is supposed to denote which meaning, renaming them unambiguously, and supplying tag summaries. If not, the tags should be merged.