The French translation for "I swim." is Je nage.. There is 1 example of the French word for "I swim." being used.
Do you have to wear Speedos in French swimming pools? - Quora
The Towering Face of French Swimming - The New York Times
FRENCH FRY SWIM (15K Subscriber Special)
Swimsuit Rule in French Pools
Brrrr! Wetsuits required as French outdoor pool cuts heating
Canal cruising in France with clean swimming? - Cognac Forum - Tripadvisor
General 4 — Beachfront Villas
Muslim women defy ban to swim in burkinis at French pool
How to Conjugate the Verb Nager (to Swim) in French
10 places to go wild swimming in South of France