If you cannot reinstall or lack internet access, you can manually swap the translation files. This requires access to a computer that has the language you want.
Before diving into the "how," it is essential to understand the "why." Paragon HDM 15 was distributed in several regional editions. Unlike modern software that changes language based on your OS locale, version 15 often hardcodes the language based on:
: Follow the prompts to finish the setup in your chosen language. Paragon Software Method 2: Manual Language File Override