[Plugin: TBTestimonials] Admin edit listing in multilanguage

I have a multilanguage site, and when I go to edit testimonials in the list I get all the titles under Author Name in all different languages.
Something ike this:

<!–:en–>Title<!–:–><!–:es–>Title<!–:–><!–:ca–>Title<!–:–><!–:zh–>Title<!–:–><!–:de–>Title<!–:–><!–:fr–>Title<!–:–><!–:it–>Title<!–:–><!–:pt–>Title<!–:–><!–:ru–>Title<!–:–>

Could you tell me how to fix it?