Possible to use Seventh Heaven with vanilla text?

[Songs]

I notice there are some unwanted text changes even if I run the game with no mods.  Is it something like the Reunion mod is embedded in Seventh Heaven with no option to disable text fixes? 
I notice "This guy is sick" for example. 

Advice please?

[Vehek]

Various text changes were made in the initial PC release, especially spelling/grammar mistakes from the PS1 version like that one.

https://www.neoseeker.com/final-fantasy-vii/faqs/163295-psx-pc-script.html
https://thelifestream.net/ffvii-the-original/ffvii-version-guide/ps-english-versus-pc-english/

Not the result of a mod, that's just how it is by default in the versions derived from the 1998 PC version. You would need a mod to revert the changes; I don't know much about what mods have been made.