They typically allow you to choose between Russian and English (audio/subtitles) during installation.
A "repack" is a modified version of a software installer designed to be smaller in size (easier to download) and simpler to install (often including built-in cracks, patches, or DLCs). RePack РѕС‚ Serega_Lus
They use high-level compression algorithms to reduce the initial download size. They typically allow you to choose between Russian