I had to summarise here so I may edit the wording if it's unclear. According to the Oxford English Dictionary "perle" had different meanings over the years in Old/Middle French:
perle pearl (c1140 in Old French; compare also Old French, Middle French perne ), bead (1260 in >Old French), the tincture argent in heraldry (a1458), highly esteemed person (1532), valuable thing >(1546), the teeth (1552), round capsule containing a medicinal substance (1853)
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Well this is just French not Old French as we are still using it :)
And the same way, we still use rubis but with an ending S.
Finally, the language you could have talked about is Ada which was named after one of the first programmers in the world, Lady Ada Lovelace.
I had to summarise here so I may edit the wording if it's unclear. According to the Oxford English Dictionary "perle" had different meanings over the years in Old/Middle French: