ZCAD

another open source CAD program  ZCAD
https://sourceforge.net/projects/zcad/?source=directory

I am the author of zcad, accidentally found it here. The project moved to https://github.com/zamtmn/zcad a long time ago. Please do not consider this an advertisement, just an correction

zohir, thanks for the information.
Wow! Great respect to the author. This is really cool CAD! After studying the video on YouTube (https://www.youtube.com/channel/UCEzN0xE8CM6XQR2xxcXxnuA), I noticed that CAD works great with very large drawings. Now, I'm trying to work in it, the interface is in English and is similar to old versions of AutoCAD. I really like it...

Kann man die Sprache b.z.w. Meuns auf Deutsch umstellen
M.F.G.J.Fey

zamtmn wird wohl nicht hören, aber offensichtlich kein Deutsch drin.
Jedenfalls V 0.9.11.0, die ich installiert habe, hat es nicht.

I hear it, but it's too late.

I can't do it, I don't know German. But a person interested in this can easily do it (of course, this will need to be supported in the future), zcad support localization based on gettext - PO files.