Ezrael
Recruit
As it seems you have no area to feedback errors in English and your original English is where the error is; I'll post this here, in the hope that a developer adds a ticket to get this fixed.
Translation Error: Since XX days
Corrected Translation: For XX days
Where did you find this error (which conversation, screen, area,...)?: The Diplomacy screen
In English 'since' is used to refer back to a specific point in time. I.e. I have been playing Bannerlord since March 2020.
'For' is used when you want to specify an amount of time. I.e. I have been playing Bannerlord for 2 years.
Translation Error: Since XX days
Corrected Translation: For XX days
Where did you find this error (which conversation, screen, area,...)?: The Diplomacy screen
In English 'since' is used to refer back to a specific point in time. I.e. I have been playing Bannerlord since March 2020.
'For' is used when you want to specify an amount of time. I.e. I have been playing Bannerlord for 2 years.