translations in guest url

[wendelinux]

guest url is always in english, while it should have the client's language

Expected Behavior

for example

lang("vat_id_short") should spit out BTW in dutch

Current Behavior

lang("vat_id_short") spits out VAT in dutch

Issue is in guest url for invoices and for quotes

[wendelinux]

after research i found out how it works, but logic is incorrect.
when having an active session, the language of that session is beeing used.
the guest url is clearly from guest and always should be displayed in connected client's language.
not userlanguage from the running session

[nielsdrost7]

when having an active session, the language of that session is beeing used.
the guest url is clearly from guest and always should be displayed in connected client's language

Do you have an indication on where to look for the solution?
What is your setting for match ip in your ipconfig.php?
Is it same problem in incognito browser window?

So admin in main browser and guest in incognito?