Some of the characters are inconsistent with the rest of the minecraft font (Picture_1) and they are changing the whole line they are in to a non-minecraft font (Picture _2, Picture_3) Also the non-minecraft font is much harder to read from a distance and therefore makes it harder to recognize the letters and the words.

Specifically in this example I used Czech language and these are the letters picked from the Czech language that are causing these issues with the font: č ď ň ř š ť ů ý