HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

Why, when installing the mod, are some texts in English and some in Russian? It's not very convenient. Also, the descriptions of secondary skills are incomplete; they are just fragments. For example, the percentage value for ranged attack is missing, and there is no text for "Basilisk Pit". Is this the case for everyone? Can this be fixed? :confused: I don't know why, but once, Inferno turned blue for me. It hasn't happened again. By the way, regarding the duplication of heroes, it's a rare occurrence; I've only encountered it once. How can I do it?

What did you mean? When describing the problem, you need to describe it specifically; otherwise, no one will understand what you're talking about, and the question will be ignored. Installing the mod consists of simply extracting the files from the archive without any installations. The fact that there is no text in the Basilisk Pit and that the descriptions of skills and spells are truncated indicates that you had an initial, flawed version of Heroes (I can't say for sure, but it was some kind of buggy version). Installing the Russian megapack will help solve your problems (it can be found on the author's page).

...and is there any way to change the descriptions of spells and skills yourself? That would be great.

The descriptions of spells are in the file SPTRAITS.txt, and the descriptions of skills are in the file SSTRAITS.txt (they are located in the megapack or the resource file h3bitmap.lod). You can make edits if you have the skills to use a text or special editor.