[مغلق] WPML and Montonio plugin

Background of the issue:
I am trying to use the Montonio payment plugin for WooCommerce on my WordPress site, which has two languages: Estonian (main) and Russian. I want the payment titles to remain in Estonian. The issue can be seen on this page: الرابط المخفي.

Symptoms:
Every time automatic updates occur, the card payments and bank payments title in Estonian 'Maksa pangas' changes to the Russian translation. I have to manually change it back to Estonian almost every day.

Questions:
Why do the payment titles change to Russian after updates?
How can I prevent the payment titles from changing languages automatically?