Salut,
C'est parce que la langue que tu as choisi n'est pas présente dans le Mod, tu peux régler ce problème en mettant le jeu en Anglais.

its happen when ur game language is different from english, my game is in portuguese so the mod text is set to chinese and in game it shows squared/weird symbols but when i change the game to english the text works, but i want to play in portuguese so i did this to fix:
0. find the mod folder:
……--> steamapps --> workshop --> content --> 289070 --> 2209309479.
1. open the ‘Texts’ folder with visual code (or other app that you can replace text in a lot of files at same time). (right click in the mod folder then click in 'Open with Code')
2. press CTRL+SHIFT+H to open 'Search' menu with replace option image guide[prnt.sc]
3. in 'Search' text box (1) put 'en_US' and in replace text box (2) put our language code (the language you use in game, i play in Portuguese so my language code is pt_BR)
German: de_DE
French: fr_FR
Italian: it_IT
Japanese: ja_JP
Korean: ko_KR
Polish: pl_PL
Portuguese: pt_BR
Russian: ru_RU
Traditional Chinese: zh_Hant_hK.
4. click in replace button (3) image guide[prnt.sc]
5. open you game and play. it should work as worked for me (image proof[prnt.sc])
it it doesn't work, you can contact me so we can try to resolve it together :)