Negative margin impossible to remove

Hello,

i have a polylang language menu with dropdown and flags activated and no language names.
My problem is there is some styling code that set a negative left margin on the dropdown so the flags are on the left and not right under the current language flag.
It seems the flag is at the place it should be if there was the language name option activated.
Can you help me please i tried many css and none worked.

Thank you,
Nicolas.