Frequently I encounter French people who use "que" on its own.

Question

Chris Wirt · Answer

Do you mean something like this:
Que tu passes des merveilleuses vacances. -- Have a great vacation!
Literally: that you may pass great holidays. 
Here you can pretend that the first part of the main clause was omitted. It may be something like: Je te souhaite, ...
-- Chris.

David Keating · Answer

No I meant that I often encounter the use of que without the preceding ne to mean only

Cécile Janty-Davies · Answer

Hi David,
 In spoken French the 'ne' will often be omitted, so you might hear:
Tu amènes que lui = you only bring him
J'ai que des soucis en ce moment = I only have problems/worries at the moment
Is this what you meant?

David Keating · Answer

Indeed

Max Kime · Answer

I hear that a lot too, especially among French millenials, who also frequently omit the subject pronoun. One hears "vendent que des fleurs" meaning "they sell flowers only". It seems there is a tendency to italianize or hispanize French by omitting subject pronouns where the context is clear. Oy veh!