You learn how to speak it...
"Je parle un peu français, mais pas assez pour avoir une conversation" I speak a bit french but not enough to have a conversation.... Simple as that.
"Let's have a conversation" in French is "On se parle".
un conversation longue.
To write "conversation" in French, you use the word "conversation." The spelling is the same as in English, but it's pronounced differently. In French, it is a feminine noun, so you would say "la conversation."
'conversation'
A Simple Conversation - 2009 was released on: USA: 18 December 2009 (AFI Conservatory Showcase)
conversation téléphonique
simple is spelled the same in French.
Une conversation à la station de train
suivre notre conversation téléphonique
Conversation is the same in French that it is in English only it's pronounced differently. If you don't know the above-mentioned word, try "talk"
Détendre, though in conversation most French people will use RELAXER, which is not really French, but what the hell.