How do you say San Juan Islands in French?

There isn't a direct translation of "San Juan Islands" into French. The best way to refer to them would be:

* Les îles San Juan: This is the most literal translation and is commonly understood.

* Les îles de San Juan: This emphasizes the "islands" aspect more, but is less common.

You could also use a more descriptive phrase, like:

* L'archipel de San Juan: This refers to the archipelago, a group of islands.

* Les îles du détroit de Puget: This refers to the islands within the Puget Sound, a large body of water.

Ultimately, the best choice depends on the context and the level of formality required.