Corrected translation into Russian

ERROR: Your plugin slug is namaste-lms, but your Text Domain is namaste. Change your Text Domain in namaste.php so it is equal to your slug!

https://developer.www.ads-software.com/plugins/internationalization/how-to-internationalize-your-plugin/#text-domains

author should fix textdomain first.

Is this the only option? It’s so inconvenient to write long slug every time, and the automated tools that add textdomain are very far from comfortable and easy to use.

Is this the only option

Yes. Textdomain must match slug. No other option.