polylang causes bad redirection 302

Hello,

I am writing to you because I had issues with my polylang plugin for 3-4 months now…
I have several languages on my homepage:
http://www.dynseo.com

but there is a temprary redirection to page http://www.dynseo.com/fr_ca, the language for French Canada, but it’s a page we barely use !
I ‘ve posted messages in several forums no one has answered me,
the people that develop the theme we use say to contact polylang plugin.

How is it possible ?

Many thanks for your help,

Justine

PS: I don’t know if it’s relevant, but I used to have WPML widget, but i have deleted all files.

https://ww.wp.xz.cn/plugins/polylang/