New Parties

####Serbia####
Conservative -- Konzervativna Stranka #Couldn't find when it was founded, only available information in the serbian wikipedia and there's no date

Reactionary (1) -- Reakcionarna Stranka #Generic/Fake, but I wouldn't use the second party as a replacement for this one, as it was very time/event-specific and wouldn't make sense outside of those dates.You could also try using `Nacionalna Stranka', National Party, it's mentioned in the election results but I can't find a single thing about it online(but by the name I assume it's reactionary/nationalistic)
Reactionary (2) -- Ustavobranitelji #1842-1858;Could also be regarded as conservative given it's leader but reactionary fits better in-game given how they fervently opposed reforms

Liberal (1) -- Liberalna Stranka #1883;It was active as an organization way before that date so it should be available from the start
Liberal (2) -- Napredna Stranka #1881;Classified as `Conservative-Liberal' but when in power did a lot of liberal reforms, so it would fit better as Liberal

Anarkoliberali -- Anarho-Liberalno Stranka #Obviously fake, not really a popular ideology

Socialist - Narodna Radikalna Stranka #1881;Probaly should be earlier in game, for balance

Communist -- Srpska Socijaldemokratska Partija #1903;Probaly should be earlier in game, for balance

Fascist -- Narodna Odbrana #1908; Not self-declared fascist but ultra-nationalist and militaristic(Paramilitary Organizations), also the only one I could find that wasn't founded in Yugoslavia

###Greece###

Conservative -- Ethnikó Kómma

Reactionary -- Kómma ton Napaíon

Liberal -- Syntagmatikó Kómma #This counts for the two parties above as well:Although the name English/Russian/French faction aren't wrong, there's better alternative names (which make more sense in greek).The other party names in vanilla(and their replacements in HPM/NNM) are good.