French has an expression "c'est epsilon" meaning something like
"it's negligible".  <a href="https://fr.wiktionary.org/wiki/epsilon">French 
wiktionary</a> says this sense is "par extension" from the mathematical usage.

There's also <a href="https://fr.wiktionary.org/wiki/lambda">lambda</a>
"(Éthologie) Un membre considéré comme le plus ordinaire d’un ensemble",
which might have a mathematical origin.