Problem with translating error strings during authorization or registration

I have made a multilingual website for 3 languages: Estonian, English and Russian. I use polylang pro and loco translate for translation. I added translation to loco translate all strings in all 3 languages ??into system translation. But he uses only the Estonian version of the translation everywhere.

The problem is this:
he connected the entire translation and translated the lines of the form, but for some reason the error lines that are displayed if the form is not completely filled out or is poisoned, they are all displayed in Estonian

What could be the problem?

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