What was the language Bazil and the others were occasionally speaking?

In the movie Micmacs (Micmacs à tire-larigot) while Bazil is scavenging for scrap (right before coming across the two weapon companies) he is talking in some strange language which I couldn't bring in connection to him or the plot. Later I think the whole group is speaking that same language while eating inside the hideout.

Was that some real language or was it made up somehow and what was the significance of them speaking this way?

(It might be relevant that I actually watched the dubbed German version of the movie, but while any other dialogue was translated those particular scenes weren't. And the words also didn't sound like actual French, but some weirdly distorted French-Norwegian-hybrid, so I guess this question applies to the original or the dubbed English version in the same or a similar way.)

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