köken: Borrowed from Old Occitan gergon, from Old French jargon (“the chattering of birds”). Ultimately of echoic origin. Compare Latin garriō (“to chatter”); English gargle, garrulous; Spanish garganta, gárgara, gargajo, jerigonza.
köken: From Old Galician-Portuguese serga, from Latin sērica (with a later prefix en- added in Portuguese). Compare Galician xerga, Spanish jerga, French serge (whence Portuguese sarja).