survey URL ?lang=...

Hi community,

I can't find an answer to the following question: I have the URL to my survey, which is only in one language, for exmple let's say:
abc.limequery.com/519354?lang=de

I tested to leave the part "?lang=de" when I provide a link to the survey. Let's say: let's say:
abc.limequery.com/519354

The browser still finds the survey/URL.
Can I leave the part with the "?lang=de"? Because then the URL is a bit shorter, which is a bit advantageous.
Or is it not save when the "?lang=de" is removed? I just don't know why there is this "?lang=de" when my survey is only in one language anyway.

LS Version 3.14

You can use the URL without the lang parameter.

Thank you