I only skimmed https://latex-project.org/lppl/ and https://latex-project.org/lppl/lppl-1-3c.html but looks CC-BY-* compatible to me; the attribution/notice requirements line up.

Who knows how long it'll take Wikimedia sites to upgrade to CC-BY-SA-4.0. If you want text from your documents to be easily incorporated into Wikipedia articles probably choose CC-BY (any version) or CC-BY-SA-3.0.