Is text.csv the excel file? For me FE_PLAYER is just showing how the player is referred to in SIngle Player and Multiplayer matches (localization). I don't think there are options for which government is in place.
Nevermind, figured it out. In case anyone else comes across this thread, search "text" in the Victoria 2 folder and click on the text.csv. Then in the code, search for
proletarian_dictatorship_ruler;Chairman;Président;Vorsitzender;;;;;;;;;;;;x;;;;;;;;;;;;;;
presidential_dictatorship_ruler;President;Président;Präsident;;;;;;;;;;;;x;;;;;;;;;;;;;;
bourgeois_dictatorship_ruler;President;Président;Präsident;;;;;;;;;;;;x;;;;;;;;;;;;;;
fascist_dictatorship_ruler;Fuhrer;Führer;Führer;;;;;;;;;;;;x;;;;;;;;;;;;;;
absolute_monarchy_ruler;King;Roi;König;;;;;;;;;;;;x;;;;;;;;;;;;;;
prussian_constitutionalism_ruler;King;King;König;;;;;;;;;;;;x;;;;;;;;;;;;;;
hms_government_ruler;King;King;König;;;;;;;;;;;;x;;;;;;;;;;;;;;
democracy_ruler;President;Président;Präsident;;;;;;;;;;;;x;;;;;;;;;;;;;;