I know that sentence is not there.
Please follow https://www.shamimsplugins.com/docs/front-end-pm-pro/getting-started-2/translate/#loco_translation (PLEASE). There is only 3 steps under “Using Loco Translate Plugin” heading. Please follow only these 3 steps.

If after following these 3 steps, still not working, Let me know. I will try to find out alternate way to translate that for you. But before that please follow that 3 steps under “Using Loco Translate Plugin” heading.

Let me know still not working.