So I have LibreCAD installed and I found that I am not able to use my language ASCII symbols, which is LATVIAN.
Such as Ā, Ē, Č, ā, ē, š and so on. I can't even wrote my name Jānis. If I do that then there instead of symbol "ā" is an empty place.
Problem in action
 Ā is present in iso.lff
 Ē, [010C] Č,  ā,  ē,  š added to iso.lff, commit b688c6ab2e
To test and use replace your iso.lff file by:
If you need more letters or want to add to another font is very easy.
Read this thread:
And if you create some new letter, please submit and are added in LibreCAD