LXTerminal, Abi Word, Galculator all have menu tabs that look like "FileEditTabsHelp" and it has been like this from the initial install.

[Yolanda]

LXTerminal screenshot: https://share.riseup.net/#h0lCKd2-ak1Re9ULxgiGXQ

Other stuff that was pulled from my system while on IRC chat:
http://paste.ubuntu.com/p/59npdHcZYV/
http://paste.ubuntu.com/p/g5398H4DTG/
http://paste.ubuntu.com/p/y3S2dZdZ5q/
http://paste.ubuntu.com/p/xzgMy9ZqmY/
`ls /var/log/syslog*` returned itself.

A post from askubuntu that was found from IRC chat that seems to have a similar issue:
https://askubuntu.com/questions/1074927/lubuntu-18-04-1-lts-broken-menus

I did change my terminal colors, some options within Openbox and the "Customize Look and Feel" program.

I do want to say again, this was the way LXTerminal menu tabs have looked since I first installed and before I changed anything.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: openbox 3.6.1-7
ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
Uname: Linux 4.15.0-34-generic i686
ApportVersion: 2.20.9-0ubuntu7.3
Architecture: i386
CurrentDesktop: LXDE
Date: Tue Sep 18 22:16:47 2018
InstallationDate: Installed on 2018-01-28 (233 days ago)
InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release i386 (20180426)
SourcePackage: openbox
UpgradeStatus: No upgrade log present (probably fresh install)

[Yolanda (geekygirl36)]

I ran 18.04 off a USB (I did not install) and the applications mentioned above looked fine. Just thought I would let you all know.

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

Sorry for the late reply here but did you see the same behavior with the original installation media before you installed? I assume you used some other media than USB?