So I got a weird report for ya. Was testing my modpack, trying to find a way to reduce memory/cpu usage (having weird luck with memory profilers too). I've heard good things about OpenJ9, and tried it briefly in the past, but never stuck with it for some reason. Decided to try it again. Everything seemed fine. 'till the modpack finished loading and the main menu had absolutely no text anywhere, minus the logo. The buttons were bare, the corner text telling MC and Forge version was gone.. it was really strange. I loaded up a test save by just remembering what buttons did what, and it's the same thing in-game. All text gone, even chat text.

At first I thought.. wow, everything dun borked. Then I remembered I had a mod changing the font. So I restarted without TrueType Font Replacement, and everything works fine now.

MC 1.12.2
forge-14.23.5.2847
Eclipse OpenJ9 VM, version 1.8.0_212 (newer versions of OpenJ9 seem to cause crashes with MC)
TTFR-1.12.1-1.9.1.jar
Lots of other mods.