I think the problem is that you are missing the "" and you haven't closed the brackets on the function SystemDateToLocalDate(). Could you try this please :
@newemail= updatedata("TEST_landing",1,"EMAIL", @email,"COUNTRY_CODE","FR", "LANGUAGE_CODE","fr", "CREATION_DATE",SystemDateToLocalDate(NOW()),"CHANNEL_LEVEL_1","Acquisition")
-> Please check the link below to see difference between the ampscript functions https://developer.salesforce.com/docs/atlas.en-us.noversion.mc-programmatic-content.meta/mc-programmatic-content/upsertdata.htm