You replaced the current names with Slovakian names.
I'm trying to get hero pictures to work for all countries. That way when you load my campaign and field German Slovakian, Hungarian, and Italian units throughout the whole war, you can see the hero picture.
In the picture above, you can see the armored car unit receiving a hero with + 1 defense. However, there is no picture.
As seen above, I can get hero attributes with other countries. However, I want the picture to be included.
By the way... check your string file. There is an error.