For all the want a German or France Language. The must edit in the Bioforge Folder the File Install.opt with Wordpad.
language=G (for German) or F (for France)
KeyboardExt=G

I just bought Bioforge because of the information that German language is included. I tried your config and found out that you need to change a third configuration entry so that all logs are in German (or French) too.

GERMAN
text=C:\BIOFORGE\monitors\Gtext.flx
language=G
KeyboardExt=G

FRENCH
text=C:\BIOFORGE\monitors\Ftext.flx
language=F
KeyboardExt=F

ENGLISH
text=C:\BIOFORGE\monitors\Ftext.flx
language=F
KeyboardExt=F

So the game is in fact multi language in audio and text. I don't understand why GOG does not make different installers for these languages to attract more foreign buyers. If this would be a legal rights problem then the files containing these languiages could not be included in the game itself I think. So this should not be a problem.

What I find weird is that my original german copy has multilanguage support already - you even have a menu switch for that if I remember correctly. I wonder why they didn't use that version to begin with.