Since the base game mostly translates menus, you may want these community additions from the Steam Workshop:
: To force specific settings, right-click the game > Properties > General > Launch Options and paste: -language russian +gmod_language ru +cc_lang russian . Enhancing the Russian Experience garri mod na russkom skachat
: Launch the game and look for a flag icon in the bottom-right corner of the main menu. Click it and select the Russian flag to instantly change the interface. Steam Properties : Right-click "Garry's Mod" in your Steam Library. Select Properties > Language . Choose Russian from the dropdown menu. Since the base game mostly translates menus, you