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https://digipres.club/system/media_attachments/files/113/734/278/791/582/573/original/daebab64edb37ca7.png
But like most alien languages in games, it's just a alternate alphabet on english.
So I found the alphabet in the EXE and overwrote it with one of the other two fonts, and now it's plain english:
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.